PC494 Просмотр технического описания (PDF) - NEC => Renesas Technology

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PC494

SWITCHING REGULATOR CONTROL CIRCUIT

NEC => Renesas Technology 

DATA SHEET

BIPOLAR ANALOG INTEGRATED CIRCUIT

µPC494

SWITCHING REGULATOR CONTROL CIRCUIT

DESCRIPTION

The µPC494 is an inverter control unit which provides all the control circuitry for PWM type switching regulators.

Included in this device is the voltage reference, dual error amplifiers, oscillator, pulse width modulator, pulse

steering flip flop, dual alternating output switches and dead-time control.

FEATURES

• Complete PWM power control circuit.

• Adjustable dead-time (0 to 100%).

• No double pulsing of same output during load transient condition.

• Dual error amplifiers have wide common mode input voltage capability (−0.3 V to VCC−2 V).

• Circuit architecture provides easy synchronization.

• Uncommitted outputs for 250-mA sink or source.

• With miss-operation prevention circuit for low level supply voltage.

• Full pin-compatible TL494C.

5 ORDERING INFORMATION

5 PIN CONFIGURATION (Top View)

Part Number

µPC494C

µPC494G

µPC494GS

Package

16-pin plastic DIP (7.62 mm (300))

16-pin plastic SOP (9.53 mm (375))

16-pin plastic SOP (7.62 mm (300))

Non-Inv. Input

1

Inv. Input

2

Feed-Back

3

Dead-Time

Control

4

CT

5

RT

6

GND

7

C1

8

16

Non-Inv. Input

15

Inv. Input

14

Ref Out

13

Output Control

12

VCC

11

C2

10

E2

9

E1

The information in this document is subject to change without notice. Before using this document, please

confirm that this is the latest version.

Not all devices/types available in every country. Please check with local NEC representative for

availability and additional information.

Document No. G12649EJ4V0DS00 (4th edition)

The mark 5 shows major revised points.

©

(Previous No. IC-1299)

Date Published November 2000 NS CP(K)

Printed in Japan

1988,2000

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