AN8018SA Ver la hoja de datos (PDF) - Panasonic Corporation

Número de pieza

componentes Descripción

Fabricante

AN8018SA

1.8-volt 2-channel step-up, step-down, or inverting DC-DC converter control IC

Panasonic Corporation 

AN8018SA

s Block Diagram

Voltage Regulators

On/ 15 On/off

off

control

FB1 5

Error amp. 1

IN−1 4

IN+1 3

FB2 13

0.9 V

Error amp. 2

IN+2 14

1.19 V

Reference 1.19 V

voltage source

Triangular wave

oscillation

VREF

VREF

0.9 V

S.C.P.

comp.

0.22 V

0.2 V

Unlatch1

U.V.L.O.

H

L

Latch

R

Q

S

VREF

PWM1

PWM2

0.9 V

Unlatch2

0.9 V

VREF

7 Out1

VCC

11 RB2

10 Out2

8 GND

s Pin Descriptions

Pin No. Symbol

Description

Pin No. Symbol

Description

1 OSC Pin for oscillation timing resistor

8 GND Grounding pin

and capacitor connection

9

VCC Power supply voltage application pin

2 S.C.P. Pin for connecting the time constant set- 10 Out2 Out2 block push-pull type output pin

ting capacitor for short-circuit protection 11 RB2 Out2 block output source current

3 IN+1 Error amplifier 1 block noninverting

setting resistor connection pin

input pin

12 DT2 PWM2 block dead-time setting pin

4 IN−1 Error amplifier 1 block inverting input pin 13 FB2 Output pin of error amplifier 2 block

5

FB1 Output pin of error amplifier 1 block 14 IN+2 Error amplifier 2 block inverting input

6

DT1 PWM1 block dead-time setting pin

pin

7 Out1 Out1 block open-collector type

output pin

15 Off On/off control pin

16 VREF Reference voltage output pin

2

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