SI9100
SI9100 is 3-W High-Voltage Switchmode Regulator manufactured by Vishay.
FEATURES
D 10- to 70-V Input Range D Current-Mode Control D On-Chip 150-V, 5-W MOSFET Switch D Reference Selection Si9100
- "1% D High Efficiency Operation (> 80%) D Internal Start-Up Circuit D Internal Oscillator (1 MHz) D SHUTDOWN and RESET
DESCRIPTION
The Si9100 high-voltage switchmode regulators are monolithic Bi C/DMOS integrated circuits which contain most of the ponents necessary to implement high-efficiency dc-to-dc converters up to 3 watts. They can either be operated from a low-voltage dc supply, or directly from a 10- to 70-V unregulated dc power source. The Si9100 may be used with an appropriate transformer to implement most single-ended isolated power converter topologies (i.e., flyback and forward), or by using a level shift circuit can generate a +5-V or a
- 5-V non-isolated output from a
- 48-V source. The Si9100 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) Error Amplifier VREF 10 (14)
- + 4 V (1%) Ref Gen 2V
- + +
- 1.2 V BIAS 1 (2) Current Sources To Internal Circuits C/L parator Current-Mode parator P 13 (18) DISCHARGE 9 (12) OSC IN 8 (11) OSC OUT 7 (10)
OSC Clock (1/2 OSC) R Q S 3 (5) 5 (8) DRAIN
- VIN (BODY)
4 (7) VCC 11 (16) 12 (17)
6 (9)
SOURCE
+VIN
2 (3) 8.8 V
- + 9.4 V
- +
Undervoltage parator Q
SHUTDOWN RESET
Note: Figures in parenthesis represent pin numbers for 20-pin package.
Applications information, see AN702 and AN713. Document Number: 70000 S-42041- Rev. G, 15-Nov-04 .vishay.
Vishay Siliconix
ABSOLUTE MAXIMUM RATINGS
Voltages Referenced to
- VIN (VCC < +VIN + 0.3 V) VCC
- -
- -
- -
- -
- -
- . . 15 V +VIN
- -
-...
