AIC1563
Versatile DC/DC Converter
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.
DESCRIPTION
The AIC1563 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 inter-
nal temperature compensated reference, com-
parator, 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 mini-
mum number of external components. Boot-
strapped driver can drive the NPN output switch
to saturation for higher efficiency and less heat
dissipation. The AIC1563 can deliver 1.5A con-
tinuous current without requiring a heat sink.
APPLICATIONS
Constant Current Source for Battery Chargers.
Saver for Cellular phones.
Step-Down DC-DC Converter Module.
TYPICAL APPLICATION CIRCUIT
R1
1K
D2
1N1418
R2
120
3C
1µF
220µH
L
D1
1N5821
+
220µF
DC
DE
CF
470pF
CT
GND
BOOST
IS
VCC
FB
RA
5.6K
RB
33K
C
O
C5
10µF
D3
1N5819
(%)
*RS
I
O
100
V
IN
= 16V, V
O
= 12V
+
90
V
IN
+
220µF
C1
V
IN
= 16V, V
O
= 8V
80
70
0
0.5
1
1.5
2
AIC1563
*I
O
=300mV/RS
Efficiency vs Output Current
Io (A )
Analog Integrations Corporation
DS-1563-01
Jan 30, 01
4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC
TEL: 886-3-5772500
FAX: 886-3-5772510
www.analog.com.tw
1
AIC [ ANALOG INTERGRATIONS CORPORATION ]
