Datasheet > FA494AF

FA494AF

更新时间： 2024-09-22 01:18:07

品牌	Logo	应用领域
FS		/
页数	文件大小	规格书
6页	154K
描述
Voltage-Mode PWM Controller IC

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FA494AF 数据手册

SEMICONDUCTOR

FA494AP/AF

BIPOLAR LINEAR INTEGRATED CIRCUIT

TECHNICAL DATA

Voltage-Mode PWM Controller IC

The FA494AP/AF incorporates on a single monolithic chip all

the functions required in the construction of a pulse-width- modulation

control circuit. Designed primarily for power supply control, this device

offers the systems engineer the flexibility to tailor the power supply control

circuitry to a specific application.

The FA494AP/AF contains two error amplifiers, an on-chip adjustable

oscillator, a dead-tme control(DTC) comparator, a pulse-steering control

flip-flop, a 5-V, 5%-precision requlator, and output-control circuits.

The error amplifiers exhibit a common-mode voltage range from -0.3V

to V_CC-2V. The dead-time control comparator has a fixed offset that

provides approximately 5% dead time.

DIM MILLIMETERS

19 3 0 2

6 45+0 2

1 52 0 1

0 46+0 1

0 50 MIN

3 8 0 3

The on-chip oscillator may be bypassed by terminating RT to the

reference output and providing a sawtooth input to CT, or it may drive

the common circuits in synchronous multiple-rail power supplies.

The uncommitted output transistors provide either common- emitter or

emitter-follower output capability. The FA494AP/AF provides for push-

pull or single-ended output operation, which may be selected through

the output-control function.

3 3 0 3

2 54

0 25+0 1/-0 05

7 62

0 - 15

DIP-16

The architecture of this device prohibits the possibility of either output

being pulsed twice during push-pull operation.

FEATURES

Completed PWM Power Control Circuitry.

Uncommitted Outputs for 200mA Sink or Source Current.

Output Control Selects Single-Ended or Push-Pull Operation.

Internal Circuitry Prohibits Double Pulse at Either Output.

Variable Dead Time Provides Control Over Total Range.

Internal Regulator Provides a Stable 5V Reference Supply With 5% Tolerance.

Circuit Architecture Allows Easy Synchronization.

DIM MILLIMETERS

9 88+0 2

3 94 0 2

6 00 0 3

0 4 0 1

0 15+0 1/-0 05

1 63 0 2

0 65 0 2

1 27

0 20+0 1/-0 05

MAXIMUM RATINGS (Ta=25

)

ITEM

SYMBOL

V_CC

RATING

UNIT

Supply Voltage

SOP-16

V_IN

V_CC+0.3

Error Amplifier Input Voltage

Collector Output Voltage

Collector Output Current

V_O

I_O

250

FUNCTION TABLE

FAC494AP

FAC494AF

750

Power

INPUT TO

P_D

OUTPUT FUNCTION

Consumption

400

OUTPUT CTRL

T_opr

T_stg

V_I=GND

V_I=V_ref

Operating Temperature

Storage Temperature

Single-ended or paralled output

Normal push-pull operation

-20 85

-25 125

2008. 8. 11

Revision No : 0

1/6

12 3 4 5 6

中文翻译

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与FA494AF相关器件

型号	品牌	获取价格	描述	数据表
FA494AP	FS	获取价格	Voltage-Mode PWM Controller IC
FA4A3Q	NEC	获取价格	RESISTOR BUILT-IN TYPE NPN TRANSISTOR
FA4A3Q	RENESAS	获取价格	100mA, 50V, NPN, Si, SMALL SIGNAL TRANSISTOR, SC-59, 3 PIN
FA4A3Q-A	NEC	获取价格	暂无描述
FA4A3Q-L-A	NEC	获取价格	PRE-BIASED "DIGITAL" TRANSISTOR,50V V(BR)CEO,100MA I(C),SC-59
FA4A3Q-T1B	RENESAS	获取价格	PRE-BIASED "DIGITAL" TRANSISTOR,50V V(BR)CEO,100MA I(C),SC-59
FA4A3Q-T1B-AT	RENESAS	获取价格	PRE-BIASED "DIGITAL" TRANSISTOR,50V V(BR)CEO,100MA I(C),SC-59
FA4A3Q-T2B	RENESAS	获取价格	PRE-BIASED "DIGITAL" TRANSISTOR,50V V(BR)CEO,100MA I(C),SC-59
FA4A3Q-T2B-A	RENESAS	获取价格	PRE-BIASED "DIGITAL" TRANSISTOR,50V V(BR)CEO,100MA I(C),SC-59
FA4A4L	NEC	获取价格	RESISTOR BUILT-IN TYPE NPN TRANSISTOR

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