SI9113_04 Datasheet, PDF (1/13 Pages) Vishay Siliconix – High-Voltage Current Mode PWM Controller for ISDN Power Supplies

Si9113
Vishay Siliconix
High-Voltage Current Mode PWM Controller for
ISDN Power Supplies
FEATURES
D BiC/DMOS Technology
D Current Mode Control
D Max 50% Duty Cycle Operation
D 1.3-MHz Error Amp
D Up to 500-kHz Internal Oscillator
D Soft-Start
D 0.6-V Fast Over-Current Protection
D <5-mA Supply Current for +V_IN <18 V
D 23.5-V to 200-V Input Voltage Range
D Programmable Start/Stop Capability
D Internal Start-Up Circuit
D Power_Good Output
DESCRIPTION
Si9113 is a current mode PWM controller for ISDN power
supplies. In a 14-pin SOIC package, it provides all necessary
functions to implement a single-switch PWM with a minimum
of external parts. To maximize the circuit integration, the
Si9113 is designed with a 200-V depletion mode MOSFET
capable of powering directly off the high input bus without an
external start-up circuit. The Start and Stop input voltage
thresholds can be programmed within the operating input
voltage range by means of a resistor divider, provided +V_IN
(Start) > +V_IN (Stop). The internal clock frequency is set with
a single external resistor and is capable of capacitor-coupled
external synchronization. In order to satisfy the stringent
ambient temperature requirements, the Si9113 is rated to
handle the industrial range of −40_C to 85_C.
The Si9113 is available in both standard and lead (Pb)-free
packages.
FUNCTIONAL BLOCK DIAGRAM
V_IN (23.5 V to 200 V)
V_OUT
Start-Up
Stop/Start
Power_Good
V_REF = 1.3 V
Drive
Current
Comparator
Fast
Current
Limit
Comparator
. See Detailed Block Diagram, page 7
Applications information see AN728.
A Demonstration Borad data sheet is available for this product.
Document Number: 71093
S-40746—Rev. B. 19-Apr-04
www.vishay.com
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