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| Semiconductor SL71062 CC, CV Control for Battery Charger & Adaptor Description The SL71062 is a voltage and current control IC which contains precision voltage reference. It is suitable for battery charger, second controller of switching regulator systems, and other battery systems. Features * Constant Voltage & Constant Current Control * Wide input voltage range : 2.2V to 14V * Internal Precision Voltage Reference : 1.240V 1% * Photo Coupler ( PC ) Drive Current : 40mA Typ. * Operating Current : 1mA Max. * Easy compensation & Low external component count. * Package Outline : SOT26. Applications * Adapters * Battery chargers Ordering Information Type NO. SL71062 Marking 762 Package Code SOT - 26 Outline Dimensions 0.95 Typ. 2.60~3.00 1.50~1.70 1 2 3 0.95 Typ. 6 5 4 0.45 Max. 2.80~3.00 unit : mm 0.19 Max. 0.10 Max. 0.40 Min. PIN Connections 1. A -INPUT 2. GND 3. B +INPUT 4. Vcc 5. PC 6. A +INPUT 1 1.00~1.20 KSD-I5P007-000 SL71062 Internal Block Diagram Typical Application : Adapter or Battery Charger Application Using SL71062 In the above application schematic, the SL71062 is used on the secondary side of a flyback adapter (or battery charger) to provide an accurate control of voltage and current. The above feedback loop is made with an optocoupler. KSD-I5P007-000 2 SL71062 Pin Description Name A -INPUT GND B +INPUT Vcc PC A +INPUT Pin No. 1 2 3 4 5 6 Function Input Pin of the Current Control Loop Ground Line. 0V Reference For All Voltages Input Pin of the Voltage Control Loop DC Supply Line Photo Coupler (P/C)Drive Pin. Sinking Current Only Input Pin of the Current Control Loop Absolute Maximum Ratings Characteristic DC Supply Voltage Power Dissipation Operating Ambient Temperature Range Storage Temperature Range Symbol Vcc Pd * Topr Tstg Value 16 500 -40 to 85 -55 to 150 Unit V * Mount on a glass epoxy circuit board of 30x30mm Pad dimension of 50mm2 Operating Conditions Characteristic DC Supply Voltage Symbol VCC Value 2.2 to 14 Unit V Electrical Characteristics Ta = 25 and VCC = 5V (unless otherwise specified) Characteristic Operating Current Leakage Current Saturation Voltage PC Terminal Current Output Voltage High Symbol Test Condition ICC IPCLEAK VPCSAT IPC VOH IPC = off V+ = VPC = 14V IPC = 20 RL = 30 Min. 20 - Typ. 0.6 500 40 VCC - 0.1 Max. 1.0 10 700 70 - Unit V KSD-I5P007-000 3 SL71062 Electrical Characteristics (Continued) Ta = 25 and VCC = 5V (unless otherwise specified) Characteristic [A CH : Current Control Loop] Reference Voltage 1) Input Bias Current Transconduction Gain 2) Symbol Test Condition Min. Typ. Max. Unit VREF(A) IB(A) GM(A) IPC = 2.5 - 105 1.5 109 20 8 113 50 - / [B Ch : Voltage Control Loop] Reference Voltage 3) Input Bias Current Transconduction Gain 4) VREF(B) IB(B) GM(B) IPC = 1.5 - 1.227 1 1.240 50 3 1.253 500 - V / 1) The internal current sense threshold is set to -109mV. The current control loop precision takes into account the cumulative effects of the internal voltage reference deviation as well as the input offset voltage of the transconduction operational amplifier. 2) When the positive input at ICTRL is lower than -109mV, and the voltage is decreased by 1mV, the sinking current at the output OUT will be increased by 8mA. 3) The internal voltage reference is set at 1.240V (bandgap reference). The voltage control loop precision takes into account the cumulative effects of the internal voltage reference deviation as well as the input offset voltage of the trans-conductance operational amplifier. 4) If the voltage on B +Input (the positive input of the amplifier) is higher than the negative amplifier input ( Vref(B) = 1.240V), and it is increased by 1mV, the sinking current at the output OUT will be increased by 3mA. KSD-I5P007-000 4 SL71062 Fig.1 Supply current vs Ambient Temperature Icc vs Ta 1.2 Fig.2 Vref(B) vs Ambient Temperature Vref(B) vs Ta 1.250 2.2V V CC 14V 1.245 Vcc: 14V 0.8 V ref(B ) [ V ] Icc[mA] 1.240 1.235 1.230 1.225 0.4 Vcc: 2.2V Vcc: 5V 0.0 -45 -25 -5 15 35 55 75 -45 -25 -5 15 35 55 75 Ta[] Ta [] Fig.3 Vref(A) vs Ambient Temperature V r e f( A) v s Ta 113 Fig.4 Saturation Voltage vs Ambient Temperature V pc s at v s Ta 700 Vcc: 5V Vpcsat(B) [mV] 111 600 500 400 300 200 100 Vcc: 5V, Ipc=20mA Vref(A)[mV] 109 107 105 -45 -25 -5 15 35 55 75 -45 -25 -5 15 35 55 75 Ta[] Ta[] Fig. 5 Input Bias Current vs Ambient Temperature 30 25 Ib( B ) [n A ] 20 15 10 5 0 -45 -25 -5 15 Ta [] 35 55 75 V CC : 5V Ib(B) vs Ta KSD-I5P007-000 5 SL71062 The AUK Corp. products are intended for the use as components in general electronic equipment (Office and communication equipment, measuring equipment, home appliance, etc.). Please make sure that you consult with us before you use these AUK Corp. products in equipments which require high quality and / or reliability, and in equipments which could have major impact to the welfare of human life(atomic energy control, airplane, spaceship, transportation, combustion control, all types of safety device, etc.). AUK Corp. cannot accept liability to any damage which may occur in case these AUK Corp. products were used in the mentioned equipments without prior consultation with AUK Corp.. Specifications mentioned in this publication are subject to change without notice. KSD-I5P007-000 6 |
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