3563

DESCRIPTION

The UTC 3563 is a monolithic control circuit containing the

primary functions required for DC to DC converters and

highside-sensed constant current source. The device consists of an

internal temperature compensated reference, comparator, controlled

duty cycle oscillator with an active current sense circuit,

bootstrapped driver, and high current output switch. This device is

specifically designed to construct a constant current source for

battery chargers with a minimum number of external components.

Bootstrapped driver can drive the NPN output switch to saturation for

higher efficiency and less heat dissipation.

FEATURES

* 3V to 30V input voltage operation.

* Internal 2A peak current switch.

* 1.5A continuous output current.

* Bootstrapped driver.

* High side current sense capability.

* High efficiency (up to 90%)

* Internal ±2% reference.

* Low quiescent current at 1.6mA.

* Frequency operation from 100Hz to 100KHz

规格书3563