U6813B-MFPG3 查看數據表（PDF） - Atmel Corporation

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U6813B-MFPG3

Fail-safe IC with High-side and Relay Driver

Atmel Corporation 

Pin Configuration

Figure 2. Pinning SO16

RELO 1

GND 2

P-RES 3

N-RES 4

P-EN 5

N-EN 6

VS

7

CAPI 8

16 3.3V

15 SGND

14 VCC

13 RELI

12 FETI

11 WDI

10 WDC

9 FETO

Pin Description

Pin Symbol

1

RELO

2

GND

3

P-RES

4

N-RES

5

P-EN

6

N-EN

7

VS

8

CAPI

9

FETO

10 WDC

11 WDI

12 FETI

13 RELI

14

VCC

15 SGND

16 3.3V

Description

Open-collector output driver

Supply

Digital output

Digital output

Digital output

Digital output

Battery supply

Analog input

Power FET output

Analog input

Digital input

Digital input

Digital input

Supply

Supply

Analog input

Function

Fail-safe relay driver

General ground

Positive reset signal

Negative reset signal

Positive enable signal

Negative enable signal

Voltage for charge pump

Input bootstrap capacitor

High voltage for N-channel FET

External RC for watchdog timer

Watchdog trigger signal

Activation of power FET

Activation of relay driver

5-V supply

Sense ground, reference for VCC and 3.3 V

3.3-V supply

Type

Driver on: L

Reset: H

Reset: L

Enable: H

Enable: L

Pulse sequence

FET on: H

Driver on: H

Fail-safe Functions

A fail-safe IC has to maintain its monitoring function even if there is a fault condition at

one of the pins (e.g., short circuit), ensuring that a microcontroller system does not

reach a “critical status”. A critical status means, for example, if the system is not able to

switch off the relay or disable the power MOSFET, or if the system is not able to provide

a signal to the microcontroller via ENABLE- and RESET-outputs in the case of a fault

condition. The U6813B is designed to handle those fault conditions according to Table 1

for a maximum of system safety.

2 U6813B

4543A–AUTO–05/02

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