SI9102
SI9102 is 3-W High-Voltage Switchmode Regulator manufactured by Vishay.
FEATURES
D 10- to 120-V Input Range D Current-Mode Control D On-chip 200-V, 7-W MOSFET Switch D SHUTDOWN and RESET D High Efficiency Operation (> 80%) D Internal Start-Up Circuit D Internal Oscillator (1 MHz)
DESCRIPTION
The Si9102 high-voltage switchmode regulator is a monolithic Bi C/DMOS integrated circuit which contains most of the ponents necessary to implement a high-efficiency dc-to-dc converter up to 3 watts. It can either be operated from a low-voltage dc supply, or directly from a 10- to 120-V unregulated dc power source. This device may be used with an appropriate transformer to implement most single-ended isolated power converter topologies (i.e., flyback and forward). The Si9102 is available in both standard and lead (Pb)-free 14-pin plastic DIP and 20-pin PLCC packages which are specified to operate over the industrial temperature range of
- 40 _C to 85 _C.
FUNCTIONAL BLOCK DIAGRAM
FB 14 (20)
P 13 (18) Error Amplifier
DISCHARGE 9 (12)
OSC IN 8 (11)
OSC OUT 7 (10)
OSC 2V
- + +
- 1.2 V C/L parator Clock (1/2 f OSC) Current-Mode parator R Q S 3 (5) 5 (8) DRAIN
- VIN (BODY)
VREF
10 (14)
- + 4 V (1%) Ref Gen
BIAS
1 (2)
Current Sources
6 (9)
To Internal Circuits
4 (7) VCC Undervoltage parator Q R 11 (16) 12 (17)
SOURCE
+VIN
2 (3) 8.8 V
- + 9.4 V
- +
SHUTDOWN RESET
Note: Figures in parenthesis represent pin numbers for 20-pin package.
Document Number: 70001 S-42040- Rev. G, 15-Nov-04
.vishay.
Vishay Siliconix
ABSOLUTE MAXIMUM RATINGS
Voltages Referenced to
- VIN (VCC < +VIN + 0.3 V) VCC
-...
