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转换器IC AP3983BCD 英文规格书


AP3983B/C/D
HIGH FREQUENCY PRIMARY SIDE POWER SWITCHER FOR OFF-LINE SMPS

Description
The AP3983B/C/D are series of high frequency power switcher for power supplies with better conversion efficiency, better voltage & current accuracy, and improved protection functions. Typical applications include charger, adapter for ADSL, home appliance power supply, LED lighting power supply and PC auxiliary power supplies. The AP3983B/C/D with built in MOSFET, regulates the output voltage and current in the primary side by piece-wise Pulse Frequency Modulation (p-PFM) in discontinuous conduction mode (DCM). The system operating frequency reduces linearly from heavy load to light load in each interval of the p-PFM, and enters constant current mode when the load current equals to the maximum system output current. The AP3983B/C/D has good transient characteristics. Typically, minimal voltage of 4.3V at PCB side can be achieved for dynamic test of 5V application system.

Pin Assignments
(Top View)
CPC FB VCC CS
1 2 3 4 6 5 7

GND

D D

SO-7 For AP3983B/C

(Top View) The AP3983B/C/D provides operating frequency dithering function to improve EMC performance of power supply. The AP3983B/C/D also has built-in fixed cable voltage drop compensation and adjustable line voltage compensation. The AP3983B/C/D solution has fewer component number, smaller size, and lower total cost. The AP3983B/C is packaged in SO-7. The AP3983C/D is packaged in PDIP-7.

CPC FB VCC CS

1 2 3 4

7

GND

6 5

D D

PDIP-7 For AP3983C/D

Features
? ? ? ? ? ? ? ? ? ? Primary Side Control for Eliminating Opto-coupler Better Transient Characteristics Built-in N Channel MOSFET with 650 BVDSS Low Start-up Current: 0.2?A (Typ.) Internal Output Cable Voltage Drop Compensation Hiccup Function to Improve Short Circuit Protection Better Over Voltage Protection Better Over Temperature Protection Low Total Cost Solution Output Power Range (Note 1): AP3983B for 6W Adapter AP3983C (SO-7) for 7.5W AP3983C (PDIP-7) for 10W Adapter AP3983D for 18W Adapter Totally Lead-Free & Fully RoHS Compliant (Notes 2 & 3) Halogen and Antimony Free. “Green” Device (Note 4)
1. Typical continuous power in a non-ventilated enclosed adapter measured at +50° C ambient. 2. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 3. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free. 4. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony compounds.

Applications
? ? ? ? ? Adapters Set Top Boxes Auxiliary Supplies Appliances LED Driver

? ?

Notes:

AP3983B/C/D
Document number: DS36784 Rev. 4 - 2

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AP3983B/C/D Typical Applications Circuit
F1 L1 C5 J1 AC 90-264V D1 to D4 C1 + C2 + R2 R7 D6 + C3 Nfb CY1 5,6 7 2 C9 R5 R6 D5 Ns T1 R1 R4 R3 D7,D8 VoC6 R8 C7 + C8 R9 +

Vo+ L2

Np

U1 1

3 VCC D

C4

CPC GND CS FB 4

R12

R13

For AP3983B/C/D (12V/1.5A)

Item C1, C2 C3 C4 C5 C6 C7, C8 C9 CY1 D1 to D6 D7, D8 F1 L1 L2

Function 15?F/400V, electrolytic 4.7?F/50V, electrolytic 10nF, ceramic, 0805 1nF/250V, ceramic 1nF/100V, 0805 1000?F/16V, electrolytic 10pF/16V, 0805 1nF/250VAC, Y1 capacitor 1N4007, rectifier diode MBR3100, Schottky diode 2A/250V, fuse 30mH, Common inductor, EE9.8 250?H/2A, Common inductor

QTY 2 1 1 1 1 2 1 1 6 2 1 1 1

Item U1 R1, R2 R3 R4 R5 R6 R7 R8 R9 R12 R13 T1 –

Function AP3983D, PDIP-7 2M?, 1206 200?, 1206 150k?, 1206 22k?, 1%, 0805 47k?, 1%, 0805 2?, 1206 30?, 1206 5.1k?,1206 1.2?, 1%, 1206 1.8?, 1%, 1206 EE20 core, PC40, transformer –

QTY 1 2 1 1 1 1 1 1 1 1 1 1 –

Pin Descriptions
Pin Number 1 2 3 4 5, 6 7 Pin Name CPC FB VCC CS D GND Function This pin connects a capacitor to GND for output cable compensation The voltage feedback from auxiliary winding This pin receives rectified voltage from the auxiliary winding of the transformer Current sense for primary side of transformer This pin is connected with an internal power MOSFET’s drain This pin is the signal reference ground

AP3983B/C/D
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AP3983B/C/D Functional Block Diagram
VCC
CS OVP/SCP/OTP/ OCkP/Max tONP Pro Regulator & Bias 3

OSC
tOSC

UVLO

0.05V 2 COMP PFM

FB

tONS Detector

tONS tOFF

Timer
512*tOSC

Detect Pulse

7

GND
Detect_On

UV/OV

UV/OV PFM

Bang_bang VFB_REF EA Constant Voltage Control R S Q

CV_ctrl

VALLEY
_ON

Driver

Line VLINE Compensation Vcs_X Vcs_X select VLOAD UV CS tONS Detect_on

VCS_REF Peak Current Control & LEB 5, 6 Shutdown

D
CC_ctrl

Constant Current Control VLOAD

R S

Q

Low Pass Filter Vcs_X 1

VCPC

Cable Compensation

VLOAD

Bang_bang Bang_bang Detector 4

CPC

CS

AP3983B/C/D
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AP3983B/C/D Absolute Maximum Ratings (Note 5)
Symbol VCC VCS, VCPC VFB BVDSS ID TJ TSTG TLEAD – – Supply Voltage Voltage on CS, CPC Pin FB Input Voltage Drain Voltage (TJ = +25° C) Drain Continuous Current (TJ = +25° C) Operating Junction Temperature Storage Temperature Lead Temperature (Soldering, 10 sec) ESD (Machine Model) ESD (Human Body Model) AP3983B AP3983C AP3983D -40 to +150 -65 to +150 +300 200 2000 AP3983B AP3983C ( SO-7) AP3983C (PDIP-7) AP3983D 0.7 0.85 1.0 1.8 Parameter Rating -0.3 to 30 -0.3 to 7 -0.3 to 8 700 1 2 4 ° C ° C ° C V V Unit V V V V A

PD

Total Power Dissipation

W

Note 5: Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are str ess ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “Recommended Operating Conditions” is not implied. Exposure to “Absolute Maximum Ratings” for extended periods may affect device reliability.

Recommended Operating Conditions
Symbol VCC TOP fS(MAX) Supply Voltage Operating Temperature Range Maximum Operating Frequency Parameter Min – -40 – Max 25 +105 80 Unit V ° C kHz

Thermal Impedance (Note 6)
Symbol Parameter AP3983B θJA Junction to Ambient AP3983C (SO-7) AP3983C (PDIP-7) AP3983D AP3983B θJC Junction to Case AP3983C (SO-7) AP3983C (PDIP-7) AP3983D Value 95 85 70 40 48 43 35 20 ° C/W Unit

Note 6: When mounted a standard single-sided FR-4 board with 300mm2 Cu (at least 35?m thick) connected to all collectors and CS pins.

AP3983B/C/D
Document number: DS36784 Rev. 4 - 2

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AP3983B/C/D Electrical Characteristics (@VCC = 15V, TJ = +25° C, unless otherwise specified.)
Symbol Parameter Condition Min Typ Max Unit

STARTUP AND UVLO SECTION VTH_ST VOPR(MIN) Turn-on Voltage Turn-off Voltage – – 13 6 15.5 6.8 18 7.6 V V

STANDBY CURRENT SECTION IST ICC_OPR Turn-on Current Operating Current VCC = VTH_ST-1V before startup Static current @ no load 0 350 0.2 500 0.6 650 μA

OPERATING FREQUENCY SECTION (5% LOAD TO FULL LOAD) Operating Frequency in Full Load – fS(MAX) Condition 5% to 100% of full load Δf/f Frequency Dithering range OPERATING FREQUENCY SECTION (NO LOAD TO 5% OF IOUT(MAX)) fS(MIN) Output Voltage Detection Frequency –

– 4

65 7

80 10

kHz %

1.8

2

2.2

kHz

CURRENT SENSE SECTION Peak Current Sense Voltage in Heavy VCS_H Load ΔVCS/VCS tMOD RLINE tLEB VCS Modulation for Frequency Dithering VCS Modulation Period Built-in Line Compensation Resistor Leading Edge Blanking

30% to 100% of full load – – – @ VCS_H and VCS_M @ VCS_EL

828 – – – 410 220

900 2.5 250 230 500 250

972 – – – 575 288

mV % μs ?? ns ns

CONSTANT VOLTAGE SECTION Equivalent Feedback Voltage @ Light VFB Load RFB VCABLE/VOUT FB Pin Input Resistance Cable Compensation Ratio

Closed loop test of VOUT – (VFB@FULLLOAD-VFB)/VFB

3.89 560 5.65

3.95 700 6.00

4.01 840 6.40

V k? %

CONSTANT CURRENT SECTION tONS/tSW Secondary Winding Conduction Duty VFB = 2V – AP3983B RDS(ON) On State Resistor AP3983C AP3983D PROTECTION FUNCTION SECTION VFB(OVP) VFB(SCP) TOTP THYS Over Voltage Protection Short Circuit Protection Shutdown Temperature Temperature Hysteresis – VFB @ Hiccup – – – 1.4 +125 – 7.5 1.5 +160 +40 – 1.6 – – V V ° C ° C – 4/8 – –

POWER MOSFET SECTION BVDSS Drain-Source Breakdown Voltage 650 – – – – 9 5 2.4 – 12 6 3 ? V

AP3983B/C/D
Document number: DS36784 Rev. 4 - 2

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AP3983B/C/D Operation Description
VBULK VIN + C1 VS D1 + VO

LM N P

NS

CO

IOUT

AP3983B/C/D
VAUX D Q1 RFB1 CS GND CPC FB NAUX

CCPC

RCS

RFB2

Figure 1. Simplified Flyback Converter Controlled by AP3983B/C/D

Constant Primary Peak Current
The primary iP(t) current is sensed by a current sense resistor RCS as shown in Figure 1. The current rises up linearly at a rate of:

diP(t ) V BULK(t ) ……… (1) ? dt LM
See equation 2 IPK iP(t)

0A

Figure 2. Primary Current Waveform As illustrated in Figure 2, when the current iP(t) rises up to IPK, the switch Q1 turns off. The constant peak current is given by:

I PK ?

VCS ………(2) RCS
1 2 ? LM ? I PK ………(3) 2

The energy stored in the magnetizing inductance LM each cycle is therefore:

EG ?

So the power transferring from input to output is given by:

1 2 P ? ? LM ? I PK ? f SW ………(4) 2
Where fSW is the switching frequency. When the peak current I PK is constant, the output power depends on the switching frequency fSW.

Constant Voltage Operation
The AP3983B/C/D captures the auxiliary winding feedback voltage at FB pin and operates in constant-voltage (CV) mode to regulate the output voltage. Assuming the secondary winding is master, the auxiliary winding is slave during the D1 on-time. The auxiliary voltage is given by:

AP3983B/C/D
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AP3983B/C/D Operation Description (Cont.)
V AUX ? N AUX ?? V O ? V D ? ………(5) NS
See equation 5

Where VD is the diode forward drop voltage, NAUX is the turns of auxiliary winding, and NS is the turns of secondary winding.

VAUX 0V Portion of tONS

tONS

Figure 3. Auxiliary Voltage Waveform The output voltage is different from the secondary voltage in a diode forward drop voltage V D which depends on the current. If the secondary voltage is always detected at a constant secondary current, the difference between the output voltage and the secondary voltage will be a fixed VD. The voltage detection point is portion of tONS after D1 is turned on. The CV loop control function of AP3983B/C/D then generates a D1 off-time to regulate the output voltage.

Constant Current Operation
The AP3983B/C/D is designed to work in constant current (CC) mode. Figure 4 shows the secondary current waveforms.
See equation 7

Is
0A tONS tOFFS

IOUT

Figure 4. Secondary Current Waveform

In CC operation, the CC loop control function of AP3983B/C/D will keep a fixed proportion between D1 on-time tONS and D1 off-time tOFFS by discharging or charging the built-in capacitance connected. This fixed proportion is

tONS 4 ? ……… (6) tOFFS 4
The relation between the output constant-current and secondary peak current IPKS is given by:

I OUT ?

1 tONS ………(7) ? I PKS ? 2 tONS ? tOFFS

At the instant of D1 turn-on, the primary current transfers to the secondary at an amplitude of:

I PKS ?

NP ? I PK ………(8) NS

Thus the output constant current is given by:

I OUT ?

1 NP ? ? I PK ………(9) 4 NS
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AP3983B/C/D
Document number: DS36784 Rev. 4 - 2

AP3983B/C/D Operation Description (Cont.)
Leading Edge Blanking (LEB)
When the power switch is turned on, a turn-on spike on the output pulse rising edge will occur on the sense-resistor. To avoid false termination of the switching pulse, a typical 500ns leading edge blanking is built in. During this blanking period, the current sense comparator is disabled and the gate driver cannot be switched off. The built-in LEB in AP3983B/C/D has shorter delay time from current sense terminal to output pulse than those IC solutions adopting external RC filter as LEB.

Built-in Cable Compensation
The AP3983B/C/D has built-in fixed voltage of 0.3V typical to compensate the drop of output cable when the load is changed from zero to full load. A typical 10nF external capacitor connected to the CPC pin is used to smooth voltage signal for cable compensation.

Over Temperature Protection
The AP3983B/C/D has internal thermal sensing circuit to shut down the PFM driver output when the die temperature reaches +160° C typical. When the die temperature drops about +40° C, the IC will recover automatically to normal operation.

Ordering Information

AP3983X XX XX - XX

Product Name AP3983B AP3983C AP3983D

Package M : SO-7 P7 : PDIP-7

Packing TR : Tape & Reel Blank : Tube

RoHS/Green G1 : Green

Package SO-7 SO-7 PDIP-7 PDIP-7

Temperature Range

Part Number AP3983BMTR-G1 AP3983CMTR-G1 AP3983CP7-G1 AP3983DP7-G1

Marking ID 3983BM-G1 3983CM-G1 AP3983CP7-G1 AP3983DP7-G1

Packing 4000/Tape & Reel 4000/Tape & Reel 50/Tube 50/Tube

-40° C to +105° C

AP3983B/C/D
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AP3983B/C/D Marking Information

(Top View)

First and Second Lines: Logo and Marking ID Third Line: Date Code Y: Year WW: Work Week of Molding A: Assembly House Code th th XX: 7 and 8 Digits of Batch No.

First Line: Logo and Marking ID Second Line: Date Code Y: Year WW: Work Week of Molding A: Assembly House Code th th XX: 7 and 8 Digits of Batch No.

AP3983B/C/D
Document number: DS36784 Rev. 4 - 2

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AP3983B/C/D Package Outline Dimensions (All dimensions in mm (inch).)
(1) Package Type: SO-7

5.800(0.228) 6.200(0.244)

1.350(0.053) 1.750(0.069)

0.330(0.013) 0.510(0.020) 2.54(0.100) TYP

4.700(0.185) 5.100(0.201)

1.270(0.050) TYP

0.080(0.003) 0.250(0.010) 3.800(0.150) 4.000(0.157) 1.250(0.049) 1.500(0.059)

0.350(0.014) TYP

45°

0° 8°

Option 1

0.450(0.017) 0.800(0.031)

0.150(0.006) 0.250(0.010)

Option 2

Note: Eject hole, oriented hole and mold mark is optional.

AP3983B/C/D
Document number: DS36784 Rev. 4 - 2

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AP3983B/C/D Package Outline Dimensions (Cont.) (All dimensions in mm (inch).)
(2) Package Type: PDIP-7

7.320(0. 288) 7.920(0. 312) 0.204(0.008) 0.360(0. 014) 3.710(0.146) 4.310(0.170) 3.200(0. 126) 3.600(0. 142)

3.000(0. 118) 3.600(0. 142)

0.510(0. 020) MIN

1.524(0. 060)BSC

0.380(0. 015) 0.570(0. 022) 2.540(0. 100)BSC 8.400(0. 331) 9.000(0. 354)

6.200(0. 244) 6.600(0. 260)

9.000(0. 354) 9.400(0. 370)

Note: Eject hole , oriented hole and mold mark is optional .

AP3983B/C/D
Document number: DS36784 Rev. 4 - 2

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AP3983B/C/D Suggested Pad Layout
(1) Package Type: SO-7

G

Z

E1

Y E X

Dimensions Value

Z (mm)/(inch) 6.900/0.272

G (mm)/(inch) 3.900/0.154

X (mm)/(inch) 0.650/0.026

Y (mm)/(inch) 1.500/0.059

E (mm)/(inch) 1.270/0.050

E1 (mm)/(inch) 2.540/0.100

AP3983B/C/D
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AP3983B/C/D

IMPORTANT NOTICE DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION). Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated website, harmless against all damages. Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel. Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application. Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and markings noted herein may also be covered by one or more United States, international or foreign trademarks. This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is the final and determinative format released by Diodes Incorporated. LIFE SUPPORT Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein: A. Life support devices or systems are devices or systems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in significant injury to the user. B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or to affect its safety or effectiveness. Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems. Copyright ? 2016, Diodes Incorporated www.diodes.com

AP3983B/C/D
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