M62241FP データシートの表示（PDF） - Renesas Electronics

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M62241FP

Single Chip Battery Charger Control IC

Renesas Electronics 

M62241FP

Function Outline

1. Adapter voltage control

2. Lithium constant current/voltage charge control

3. Battery connect detection

4. Battery temperature detection

5. Battery voltage detection

6. Charge current detection

7. LED indication

8. Timer

9. Adapter mode change

Functional Description

Each voltages written in following are set in standard application circuit.

1. Adapter Constant Voltage Control

VDET pin supplies this block with voltage to control voltages of both adapter and protection during charge. Control

reference voltage, applied by REFOUT pin, is constant.

Output voltage is generated from dividing the adapter voltage by external two resistors connected to VDET pin and the

modification of the dividing ratio of these resistors by CHG pin changes the voltage of Adapter/Charge.

2. Charge Constant Current Control Block

IDET pin supplies this block with voltage to control constant current during charge and is controlled directly by the

voltage of 0.1 Ω resistance, connected to low side, for the current detection. Control referential voltage is set by ratio

between external two resistors connected to REFOUT pin. Battery temperature detection control performs switching

quick and trickle by selecting ADJ pin as follows:

Quick charge: ADJ1 pin

Trickle charge: ADJ2 pin

Adapter constant voltage control, written in 1 clause, is capable of invalidating this control.

3. Charge Constant Voltage Control Block

VBIN pin supplies this block with voltage to control constant voltage during charging. Output voltage of VBOUT pin,

gained differentially from battery voltage, supplies to VBIN pin. Control referential voltage, applied from REFOUT pin,

is constant.

4. Charge SW Driving Circuit Control Block

This block controls SW pin, driving transistor for charging SW.

Charge off: SW = OPEN

Charge on: SW = L

5. Battery Voltage Differential Gain Block

Battery voltage input from B+/B– pin directly and outputs to VBOUT pin after differential gained. The gain of

amplifier is 1/3.

VBOUT = 1 / 3 (VB+ – VB–)

Input of OP-amp for differential gain or feedback resistance depends on external circuit element.

REJ03F0240-0200 Rev.2.00 Jun 16, 2008

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