MAX1570(2002) Ver la hoja de datos (PDF) - Maxim Integrated

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MAX1570
(Rev.:2002)

White LED Current Regulator with 1x/1.5x High-Efficiency Charge Pump

Maxim Integrated 

White LED Current Regulator with 1x/1.5x

High-Efficiency Charge Pump

Table 1. Enable Input Modes

EN_ INPUT LOGIC LEVELS

EN1 = 0, EN2 = 0

EN1 = 0, EN2 = 1

EN1 = 1, EN2 = 0

EN1 = 1, EN2 = 1

MODE

Shutdown mode

On, VSET = 200mV, LED1 threshold = 200mV

On, VSET = 400mV, LED1 threshold = 300mV

On, VSET = 600mV, LED1 threshold = 400mV

LED CURRENT

0

1/3

2/3

Full

Table 2. Capacitor Selection

OUTPUT

CIN

C1

C2

(mA)

(µF)

(µF)

(µF)

40

1

0.22

0.22

80

1

0.47

0.47

150

1

1.0

1.0

COUT

(µF)

4.7

4.7

4.7

Table 3. Capacitor Manufacturers

COMPONENT NAME

CIN

COUT

C1 and C2

VALUE

(µF)

1

4.7

1

0.47

0.22

MANUFACTURER

Taiyo Yuden

Taiyo Yuden

Taiyo Yuden

Taiyo Yuden

Taiyo Yuden

PART NO.

DESCRIPTION

JMK107BJ105MA

JMK212BJ475MG

JMK107BJ105MA

LMK107BJ474MA

LMK107BJ224KA

1µF ±20%, 6.3V X5R ceramic capacitor (0603)

4.7µF ±20%, 6.3V X5R ceramic capacitor (0805)

1µF ±20%, 6.3V X5R ceramic capacitor (0603)

0.47µF ±20%, 10V X5R ceramic capacitor (0603)

0.22µF ±10%, 10V X7R ceramic capacitor (0603)

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