HA17451AP 查看數據表（PDF） - Hitachi -> Renesas Electronics

零件编号

产品描述 (功能)

生产厂家

HA17451AP

Regarding the change of names mentioned in the document/ such as Hitachi Electric and Hitachi XX/ to Renesas Technology Corp.

Hitachi -> Renesas Electronics 

HA17451AP/HA17451AFP

Short-circuit Protection in HA17451A

← Feedback line

Also used as positive feedback route

5

12

(2)

(voltage drop)

Error Amp2

14 +

13 –

Low

+

+

–

1.23 V

Vref

High

15

PWM Comparator2

+

–

–

(3)

Vref

Low

R

U.V.L.O.

VB

10

Vout (1)

Load

Shutdown

(1)Overcurrent → (2)Vout drops → (3)Output turns off

Positive

feedback

Absolute Maximum Ratings (Ta = 25°C)

Item

Symbol

Rating

Unit

Note

Power supply voltage

Error amplifier input voltage

Collector output voltage

Collector output current

Power dissipation

Operating temperature

VCC

VI

VO

IO

PT

Topr

40

V

20

V

40

V

50

mA

680

mW

*

− 20 to +85

°C

Storage temperature

Tstg

− 55 to +125

°C

Note: This value applies to the HA17451AP at ambient temperatures up to Ta = 45°C. Derate by8.3

mW/°C above that point.

5

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