VIPER28 Ver la hoja de datos (PDF) - STMicroelectronics

Número de pieza

componentes Descripción

Fabricante

VIPER28

Off-line high voltage converters

STMicroelectronics 

VIPER28

1

Block diagram

Block diagram

Figure 2. Block diagram

EPTTovl

CONT

LEB

ETPoTv l

BLOCK

OLP

SOFT

START

OCP

BLOCK

OVP DETECTION

LOGIC

PWM

BLOCK

OVP

FB

VDD

DRAIN

OSCILLATOR

OCP

+

PWM

-

+

-

Disable

Internal Supply bus

&

Ref erence Voltages

SUPPLY

& UVLO

UVLO

BURST

TURN-ON

LOGIC

LEB

S

Q

R

2nd OCP

2nd OCP

LOGIC

HV_ON

IDDch

THERMAL

SHUTDOWN

OTP

QS

R

HV_ON

OTP OVP OLP

BURST-MODE

LOGIC

BURST

Rsense

GND

2

Typical power

Table 2. Typical power

Part number

230 VAC

Adapter(1)

Open frame(2)

85-265 VAC

Adapter(1)

Open frame(2)

VIPER28

18 W

20 W

10 W

12 W

1. Typical continuous power in non ventilated enclosed adapter measured at 50 °C ambient.

2. Maximum practical continuous power in an open frame design at 50 °C ambient, with adequate heat sinking.

Doc ID 15028 Rev 5

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