AP3706 high performance AC/DC power supply controller battery charger

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AP3706 high performance AC/DC power supply controller battery charger

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Data Sheet PRIMARY SIDE CONTROL OFF-LINE BATTERY CHARGERS General Description
AP3706 high performance AC/DC power supply controller battery charger adapter applications. device uses Pulse Frequency Modulation (PFM) method build discontinuous conduction mode (DCM) flyback power supplies. AP3706 provides constant voltage, constant current (CV/CC) regulation without requiring optocoupler secondary control circuitry. also eliminates need loop compensation circuitry while maintaining stability. AP3706 achieves excellent regulation high power efficiency, no-load power consumption less than 200mW 265VAC input. AP3706 available SOIC-8 DIP-8 packages.
AP3706
Primary Side Control Rectangular Constant Current Constant Voltage Output Eliminates Opto-Coupler Secondary CV/CC Control Circuitry Eliminates Control Loop Compensation Circuitry Flyback Topology Operation Random Frequency Modulation Reduce System Valley Turn External Power Transistor Built-in Soft Start Open Circuit Protection Over Voltage Protection Short Circuit Protection
Applications
Adapters/Chargers Cell/Cordless Phones, PDAs, Other Portable Apparatus Standby Auxiliary Power Supplies
SOIC-8
DIP-8
Figure Package Types AP3706
Mar. 2009 Rev.
Semiconductor Manufacturing Limited
Data Sheet PRIMARY SIDE CONTROL OFF-LINE BATTERY CHARGERS Configuration
Package (SOIC-8)
AP3706
Package (DIP-8)
COMP BIAS
COMP BIAS
Figure Configurations AP3706 (Top View)
Description
Number Name BIAS COMP primary current sense Supply voltage This drives base external power switch Ground voltage feedback from auxiliary winding output internal voltage regulator This sets bias current inside AP3706 with external resistor This connects bypass capacitor function Function
Mar. 2009 Rev.
Semiconductor Manufacturing Limited
Data Sheet PRIMARY SIDE CONTROL OFF-LINE BATTERY CHARGERS Functional Block Diagram
UVLO
AP3706
OCkP
Regulator Bias UVLO
0.1V COMP Tonsec Detector Tons
BIAS
4.0V Tons
COMP pfm_d CV_ctrl Driver
COMP 0.5V Delay 430ns pfm_d
COMP 0.46V Tons
COMP
3.75V
COMP
CC_ctrl
0.75*I
Figure Functional Block Diagram AP3706
Mar. 2009 Rev.
Semiconductor Manufacturing Limited
Data Sheet PRIMARY SIDE CONTROL OFF-LINE BATTERY CHARGERS Ordering Information
AP3706 Circuit Type Package SOIC-8 DIP-8
Package SOIC-8 DIP-8 Temperature Range Part Number Lead Free AP3706M-E1 85oC AP3706MTR-E1 AP3706P-E1 Green AP3706M-G1 AP3706MTR-G1 AP3706P-G1
AP3706
Lead Free Green Tape Reel Blank: Tube
Marking Lead Free 3706M-E1 3706M-E1 AP3706P-E1 Green 3706M-G1 3706M-G1 AP3706P-G1
Packing Type Tube Tape Reel
Tube
Semiconductor's Pb-free products, designated with "E1" suffix part number, RoHS compliant. Products with "G1" suffix available green packages.
Absolute Maximum Ratings (Note
Parameter Supply Voltage Voltage BIAS, OUT, VDD, COMP input (Pin Output Current Power Dissipation TA=25oC Operating Junction Temperature Storage Temperature Lead Temperature (Soldering, 10s) SOIC-8 Thermal Resistance Junction-to-Ambient (Machine Model) DIP-8 Value -0.3 -0.3 Internally limited 0.657
Unit
Note Stresses greater than those listed under "Absolute Maximum Ratings" cause permanent damage device. These stress ratings only, functional operation device these other conditions beyond those indicated under "Recommended Operating Conditions" implied. Exposure "Absolute Maximum Ratings" extended periods affect device reliability.
Mar. 2009 Rev.
Semiconductor Manufacturing Limited
Data Sheet PRIMARY SIDE CONTROL OFF-LINE BATTERY CHARGERS Electrical Characteristics
(VCC=15V, TA=25oC, unless otherwise specified.)
Parameter UVLO SECTION Start-up Threshold Minimal Operating Voltage (ST) VOPR(min) After turn RBIAS=200k, Before turn 18.5 Symbol Conditions Unit
AP3706
REFERENCE VOLTAGE SECTION BIAS Voltage Voltage STANDBY CURRENT SECTION Start-up Current Operating Current DRIVE OUTPUT SECTION Maximum Current Sink Source CURRENT SENSE SECTION Current Sense Threshold Pre-Current Sense Leading Edge Blanking FEEDBACK INPUT SECTION Feedback Current Input Leakage VFB(EN) VFB=4V 10.0 3.90 -0.9 12.5 4.00 -0.7 15.0 4.10 -0.5 VCS(PRE) IOUT RBIAS=200k ICC(OPR) (ST)-0.5V, RBIAS=200k, Before turn RBIAS=200k VBIAS 1.170 4.75 1.205 1.240 5.25
Feedback Threshold Enable Turn-on Voltage
COMP THRESHOLD VOLTAGE SECTION Turn-on Threshold Voltage PROTECTION SECTION Over Voltage Protection VFB(OVP) VCOMP 3.42 3.60 3.78
Mar. 2009 Rev.
Semiconductor Manufacturing Limited
Data Sheet PRIMARY SIDE CONTROL OFF-LINE BATTERY CHARGERS Typical Performance Characteristics AP3706
19.5
19.0 18.5
Startup Current (µA) RBIAS=200k
Start-up Voltage
18.0
17.5
17.0
RBIAS=200k
16.5
Ambient Temperature
Ambient Temperature
Figure Start-up Voltage Ambient Temperature
Figure Start-up Current Ambient Temperature
5.20 5.15 5.10 5.05
Operating Current (µA)
RBIAS=200k
5.00 4.95 4.90 4.85 4.80
Ambient Temperature
Ambient Temperature
Figure Operating Current Ambient Temperature
Figure Ambient Temperature
Mar. 2009 Rev.
Semiconductor Manufacturing Limited
Data Sheet PRIMARY SIDE CONTROL OFF-LINE BATTERY CHARGERS Typical Performance Characteristics (Continued) AP3706
Source Current (mA)
Start-up Current (µA)
TA=25
TA=25
Bias Resistor
Bias Resistor
Figure Start-up Current Bias Resistor
Figure Source Current Bias Resistor
Mar. 2009 Rev.
Semiconductor Manufacturing Limited
Data Sheet PRIMARY SIDE CONTROL OFF-LINE BATTERY CHARGERS Operation Description
Bridge
AP3706
VAUX NAUX
AP3706
Figure Simplified Flyback Converter Controlled AP3706
Figure illustrates simplified flyback converter controlled AP3706. Constant Primary Peak Current primary current ip(t) sensed current sense resistor shown Figure current rises linearly rate
energy stored magnetizing inductance each cycle therefore:
.(3)
power transferring from input output given
.(1)
Ipk2
.(4)
equation
Where switching frequency. When peak current constant, output power depends switching frequency fsw. Constant Voltage Operation AP3706 captures auxiliary winding feedback voltage operates constant-voltage (CV) mode regulate output voltage. Assuming secondary winding master, auxiliary winding slave during on-time. auxiliary voltage given
Figure Primary Current Waveform
illustrated Figure when current ip(t) rises Ipk, switch turns off. constant peak current given
Mar. 2009 Rev.
.(2)
.(5)
Semiconductor Manufacturing Limited
Data Sheet PRIMARY SIDE CONTROL OFF-LINE BATTERY CHARGERS Operation Description (Continued)
Where diode forward drop voltage.
equation
AP3706
relationship between output constant-current secondary peak current Ipks given
Tons .(7) Iout Tons Toffs
instant turn-on, primary current transfers secondary amplitude
Tons Tons
Ipks
.(8)
Figure Auxiliary Voltage Waveform
output voltage different from secondary voltage diode forward drop voltage. diode drop voltage depends current. secondary voltage always detected constant secondary current, difference between output voltage secondary voltage will fixed voltage detection point two-thirds on-time. loop control function AP3706 then generates off-time regulate output voltage. Constant Current Operation AP3706 designed work constant-current (CC) mode. Figure shows secondary current waveforms.
equation
Thus output constant-current given
Tons Iout Tons Toffs
.(9)
Leading Edge Blanking When power switch turned turn-on spike will occur sense-resistor. avoid falsetermination switching pulse, 430ns leadingedge blanking built During this blanking period, current sense comparator disabled gate driver switched off. Protection AP3706 designed operate discontinuous conduction mode (DCM) both modes. avoid operating continuous conduction mode (CCM), AP3706 detects falling edge input voltage each cycle. 0.1V falling edge detected, AP3706 will stop switching. OCkP AP3706 includes output over-voltage protection (OVP) open circuit protection (OCkP) circuitry shown Figure voltage exceeds 100% above normal detection voltage, -0.7V falling edge input monitored, AP3706 will immediately shut enters hiccup mode. AP3706 sends fault detection pulse every hiccup mode until fault been removed. Semiconductor Manufacturing Limited
Tons Toffs
Iout
Figure Secondary Current Waveform
operation, loop control function AP3706 will keep fixed proportion between ontime Tons off-time Toffs discharging charging capacitance connected COMP pin. fixed proportion
Tons Toffs
Mar. 2009 Rev.
.(6)
Data Sheet PRIMARY SIDE CONTROL OFF-LINE BATTERY CHARGERS Operation Description (Continued) AP3706
COMP
COMP -0.7V Timer_8ms
UVLO
Figure OCkP Function Block
Typical Application
Bridge 5V/1A 85-264V
VOR2
AP3706
BIAS COMP
Figure 5V/1A Output Battery Charger Mobile Phone
Mar. 2009 Rev.
Semiconductor Manufacturing Limited
Data Sheet PRIMARY SIDE CONTROL OFF-LINE BATTERY CHARGERS Mechanical Dimensions SOIC-8 Unit: mm(inch) AP3706
4.700(0.185) 5.100(0.201)
1.350(0.053) 1.750(0.069)
0.320(0.013)
0.675(0.027) 0.725(0.029)
5.800(0.228) 6.200(0.244)
20:1
1.270(0.050)
0.100(0.004) 0.300(0.012) R0.150(0.006)
0.800(0.031) 0.200(0.008)
1.000(0.039) 3.800(0.150) 4.000(0.157)
0.330(0.013) 0.510(0.020)
0.190(0.007) 0.250(0.010) 0.900(0.035)
R0.150(0.006)
0.450(0.017) 0.800(0.031)
Note: Eject hole, oriented hole mold mark optional.
Mar. 2009 Rev.
Semiconductor Manufacturing Limited
Data Sheet PRIMARY SIDE CONTROL OFF-LINE BATTERY CHARGERS Mechanical Dimensions (Continued) DIP-8 Unit: mm(inch) AP3706
0.700(0.028) 7.620(0.300)TYP 1.524(0.060)
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
0.254(0.010)TYP 0.360(0.014) 0.560(0.022) 2.540(0.100) 0.130(0.005)MIN
0.204(0.008) 0.360(0.014) 8.200(0.323) 9.400(0.370)
R0.750(0.030) 3.000(0.118) Depth 0.100(0.004) 0.200(0.008) 9.000(0.354) 9.400(0.370)
6.200(0.244) 6.600(0.260)
Note: Eject hole, oriented hole mold mark optional.
Mar. 2009 Rev.
Semiconductor Manufacturing Limited
Semiconductor Manufacturing Limited
http://www.bcdsemi.com
IMPORTANT NOTICE Semiconductor Manufacturing Limited reserves right make changes without further notice products specifications herein. Semiconductor Manufacturing Limited does assume responsibility products particular purpose, does Semiconductor Manufacturing Limited assume liability arising application products circuits. Semiconductor Manufacturing Limited does convey license under patent rights other rights rights others.
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REGIONAL SALES OFFICE Shenzhen Office REGIONAL SALES OFFICE
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AP3706 high performance AC/DC power supply controller battery charger

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