Si9118 Vishay Intertechnology, Si9118 Datasheet

Si9118

Manufacturer Part Number

Si9118

Description

Manufacturer

Vishay Intertechnology

Datasheet

1.SI9118.pdf (8 pages)

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Company:

Bonase Electronics (HK) Co., Limited

Part Number:

Si9118DY

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Part Number:

Si9118DY

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Download datasheet (84Kb)

The Si9118/Si9119 are a BiC/DMOS current-mode pulse width

modulation (PWM) controller ICs for high-frequency dc/dc

converters. Single-ended topologies (forward and flyback) can

be implemented at frequencies up to 1 MHz. The controller

operates in constant frequency mode during the full load and

automatically switches to pulse skipping mode under light load

to maintain high efficiency throughout the full load range. The

maximum duty cycle is easily programmed with a resistor

divider for optimum control.

The push-pull output driver provides high-speed switching to

external MOSPOWER devices large enough to supply 50 W

of output power. Shoot-through current for internal push-pull

Document Number: 70815

S-60752—Rev. B, 05 Apr-99

SS/EN

REF

10- to 200-V Input Range

Current-Mode Control

Internal Start-Up Circuit

Buffer Slope Compensation Voltage

Amplifier

Gen

Ref

Error

–

COMP

4.6 V

23 A

–V

–

Programmable Duty Cycle Controller

1.0 – 2.0 V

600 mV

100 mV

–

LIMIT

9.3 V (V

PWM/PSM

8.6 V

–

REG

Pulse Skip

MAX

–

)

Soft-Start

2.7-MHz Error Amp

500-mA Output Drive Current

Light Load Frequency Fold-Back

New Product

PWM

Undervoltage

Lockout

stage is almost eliminated to minimize quiescent supply

current.

The high-voltage DMOS transistor permits direct operation

from bus voltages of up to 200 V. Other features include a 1.5%

accurate voltage reference, 2.7-MHz bandwidth error

amplifier, standby mode, soft-start and undervoltage lockout

circuits.

The Si9118/Si9119 are available in a 16-pin SOIC package

and is specified over the industrial, D suffix (–40 C to 85 C)

temperature range.

SYNC (Si9119)

(Si9118)

OSC

Low Quiescent Current

Programmable

Maximum Duty Cycle,

with 80% as Default

www.Vishay Siliconix.com FaxBack

MAX

Substrate

Vishay Siliconix

Si9118/Si9119

–V

OSC

408-970-5600

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