SC4614 Просмотр технического описания (PDF) - Semtech Corporation

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SC4614

500kHz Voltage Mode PWM Controller

Semtech Corporation 

POWER MANAGEMENT

Applications Information (Cont.)

Performance Characteristics (12V Input)

Efficiency (%) vs Load Current

90

85

80

75

70

65

60

1

3

5

7

9

11

13

15

Load Current (A)

Load Characteristics (Output vs Load Current)

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0.0

0

5

10

15

20

Load Current(A)

Gate Waveforms (Io=15A)

DL (10V/DIV)

DH (10V/DIV)

SC4614

Start up

12V Input (5V/DIV)

1.5V Output (1V/DIV)

X=5 m s /DIV

Transient Response

1.5V Output Respo nse (100mV/DIV)

Step Load Current (10A/DIV)

X =2 0 us /DIV

Short Circuit Protection

Output Short

1.5V OUT (1V/DIV)

PN (10V/DIV)

 2005 Semtech Corp.

X =5 0 ns /DIV

11

Output Current (10A/DIV)

X= 5 m s /DIV

www.semtech.com

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