UNISONIC TECHNOLOGIES CO., LTD

UB244A

Preliminary

CMOS IC

www.unisonic.com.tw

1 of 11

Copyright © 2012 Unisonic Technologies Co., Ltd

QW-R502-857.a

LI-ION BATTERY PROTECTION

IC FOR 1-CELL TO 4-CELL PACK

(SECONDARY PROTECTION)

DESCRIPTION

The UTC UB244A Series is secondary protection IC for 1-, 2-, 3-,

or 4-Cell lithium-ion rechargeable battery packs, and incorporates a

high-accuracy voltage detection circuit.

The UTC UB244A Series also includes a high accuracy delay

circuit for over voltage detection time can be set by an external

capacitor.

FEATURES

* High-accuracy voltage detection circuit for each cell

* Overcharge detection voltage n (n=1 to 4): 4.05V to 4.50V

(in 50mV steps)

* Overcharge hysteresis voltage n (n=1 to 4): 0.38V±0.10V,

0.25V±0.07V, 0.13V±0.04V, 0.045V±0.02V, None

* Delay times for overcharge detection can be set by an external

capacitor

* CMOS output active “H”

* Wide operating voltage range 3.6V to 24V

* Wide operating temperature range −40°C to +85°C

* Low current consumption: 1.5μA typ. (+25°C) at 3.5V for each cell

ORDERING INFORMATION

Ordering Number

Package

Packing

Lead Free

Halogen Free

UB244AL-xx-SM1-R

UB244AG-xx-SM1-R

MSOP-8

Tape Reel

Note: xx: Output Voltage, refer to Marking Information.

UB244AG-xx-SM1-R

(1)Packing Type

(2)Package Type

(3)Output Voltage Code

(1) R: Tape Reel

(2) SM1: MSOP-8

(3) xx: Refer to Marking Information

(4) G: Halogen Free, L: Lead Free

(4)Halogen Free