SE34063 Datasheet, PDF (1/5 Pages) Seaward Electronics Inc. – DC-to-DC Converter Control Circuit

SEAWARD
ELECTRONICS
INC.
DC-to-DC Converter
Control Circuit
SE34063
DESCRIPTION
The SE34063 is a monolithic control circuit
containing the primary functions required for
DC-to-DC converter. The device consists of an
internal temperature compensated reference,
comparator, controlled duty cycle oscillator with an
active current limit circuit, driver and high current
output switch. This was specifically designed to be
incorporated in Step-up, and Step-down and
Voltage-Inverting applications with a minimum
number of external components.
FEATURES
¾ Operation from 3.0V to 35V input
¾ Dip-8 Packages
¾ Low Standby Current
¾ Output Switch Current to 1.5A
¾ Output Voltage Adjustable
¾ Frequency Operation to 100KHz
¾ Precision 2% Reference
APPLICATION
¾ Battery charges
¾ Power supply adapter
¾ DC-to-DC converter, such as 12 to 5V.
PIN CONFIGURATIONS
DIP-8 (Top View)
SC 1
8 DRIC
SE 2
7 ^Ipk
TC 3
6 Vcc
GND 4
5 CII
DIP-8
SOP-8
SC
SE
TC
GND
1
8
2
7
3
6
4
5
SOP-8
DRIC
Ipk
Vcc
CII
BLOCK DIAGRAM
Drive ⁸
Collector
Ipk ₇
Sense
Vcc ⁶
Ipk
CT
Oscillator
Comparator
+
-
Comparator ⁵
Inverting Input
SQ
R
1.25V
Reference
Regulator
1 Switch
Collector
2 _Switch
Emitter
3 Timing
Capacitor
4 _Gnd
Preliminary and all contents are subject to change without prior notice.
©2001SEAWARD ELECTRONICS INC. http:// www.seawardinc.com.cn Tel: [phone]
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