SC2443EVB(2007) Просмотр технического описания (PDF) - Semtech Corporation

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производитель

SC2443EVB
(Rev.:2007)

Dual-Phase Single or Two Output Synchronous Step-Down Controller

Semtech Corporation 

SC2443

Typical Application Circuit Performance

Circuit Conditions : Dual independent outputs configuration as shown in page 17

Soft Start (VOUT1)

Soft Start (VOUT2)

Soft Start (Both outputs)

COMP1

EN1/SS1

2V/DIV

VIN

2V/DIV

VOUT1

1V/DIV

10ms/DIV

Gate waveforms (VOUT1_2 = 20A)

COMP2

1V/DIV

EN2/SS2

2V/DIV

VIN

2V/DIV

VOUT2

2V/DIV

10ms/DIV

Output Ripple (VOUT1_20A)

SS1/EN1

2V/DIV

VOUT1

0.5V/DIV

SS2/EN2

2V/DIV

VOUT2

2V/DIV

20ms/DIV

Output Ripple (VOUT2_20A)

GDH1

GDL1

10V/DIV

GDH1

GDL1

10V/DIV

GDH2

GDL2

10V/DIV

GDH2

GDL2

10V/DIV

VOUT1

50mV/DIV

VOUT2

50mV/DIV

1us/DIV

Transient Response (VOUT1 _ 2A ~ 17A)

1us/DIV

Transient Response (VOUT2 _ 2A ~ 17A)

1us/DIV

OCP Trip (VOUT1 = 30A)

VOUT1

50mV/DIV

VOUT2

50mV/DIV

200us/DIV

OCP Trip (VOUT2 = 28A)

SS2/EN2

2V/DIV

GDH2

20V/DIV

GDL2

10V/DIV

VOUT2

1V/DIV

400us/DIV

SS1/EN1

2V/DIV

GDH1

GDL1

20V/DIV

200us/DIV

VOUT1

0.5V/DIV

400us/DIV

EFF (%) Combined Efficiency (12VIN to 1VOUT & 2.5VOUT)

95

90

85

80

75

70

1

5

10

15

20 IOUT(A)



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