MIC2142(2000) Ver la hoja de datos (PDF) - Micrel

Número de pieza

componentes Descripción

Fabricante

MIC2142
(Rev.:2000)

Micropower Boost Converter

Micrel 

MIC2142

VIN

C2

10µF

L1

47µH

CR1

MBR0530

R2

36.5k

+5V @16mA

C3

270pF

U1 MIC2142

4 FB SW 3

GND 2

5 EN VCC 1

R1

12.4k

C1

22µF

GND

GND

Figure 2. Booststrap Configuration

For additional predesigned circuits, see Table 4.

L1

10µH

CR1

MBR0530

VIN

+15V @15mA

CR5

LWT673

CR7

LWT673

U1 MIC2142

4 FB SW 3

CR6

LWT673

(from µcontroller)

PWM

C2

10µF

GND

GND 2

5 EN VCC 1

C1

1µF

25V

Rprogram

82Ω

GND

Figure 3. Series White LED Driver with PWM Dimming Control

L1

10µH

CR1

MBR0530

VIN

+15V @15mA

CR5

LWT673

CR7

LWT673

U1 MIC2142

4 FB SW 3

C2

GND 2

C1

10µF

1µF

SHTDWN

5 EN VCC 1

25V

GND

CR6

LWT673

Rprogram

82Ω

GND

DAC

R4

R3

Figure 4. Series White LED Driver with Analog Dimming Control

December 2000

9

Micrel

MIC2142

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