’99.12.9

PRELIMINARY

Li-Ion BATTERY PROTECTOR

R5422NxxxC/xxxE series

Rev. 0.01

- 1 -

The R5422NxxxC/E Series are protection ICs for over-charge/discharge of rechargeable one-cell Lithium-ion (Li+) excess load

current, further include a short circuit protector for preventing large external short circuit current.

Each of these ICs is composed of three voltage detectors, a reference unit, a delay circuit, a short circuit protector, and a logic

pin, the output of over-charge detector/VD1, switches to low level, charger's negative pin level after the delay time by setting an

After R5422NxxxC/E Series detect the over-discharge voltage, connect a charger to the battery pack, and when the battery

“H” level.

An excess load current can be sensed and cut off after internally fixed delay time passed through the built in excess current

switches to high by detaching a battery pack from a load system.

l High Voltage Process Technology

l Low supply current....................................................Supply current

Typ. 6.0µA

Standby current (detecting over-discharge)

Typ. 0.1µA

l High accuracy detector threshold ..............................Over-charge detector (Topt=25°C)

±25mV

(Topt=0 to 50°C)

±30 mV

Over-discharge detector

±2.5%

Excess current detector

±20mV

l Variety of detector threshold .....................................Over-charge detector threshold

4.0V - 4.5V step of 0.01V

Over-discharge detector threshold

2.0V - 3.0V step of 0.01V

l Built-in protection circuit ..........................................Excess current protection

0.05V - 0.4V step of 0.01V

l Output delay of over-discharge .................................Internally fixed TYP. 17ms

l Output delay of excess-current

Internally fixed TYP. 10ms

l 2 Over-current modes

Excess Current Mode / Short Mode

l Charging Available / non-available at 0V Cell

Acceptable of 0V Cell

C version

Non-acceptable of 0V Cell E versi on

l Small package............................................................SOT-23-6 / 6-pin

l Li+ one-cell protector for battery pack