TPS60230RGTR datasheet(8/15 Pages) TI

Part #	TPS60230RGTR

Description	WHITE LED CHARGE PUMP CURRENT SOURCE WITH PWM BRIGHTNESS CONTROL

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Manufacturer	TI [Texas Instruments]

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VI

ILED(D1)

3.6 V

AC

EN1 = 1, EN2 = 1, VI = 3.6 V to 4.2 V,

ILED = 20 mA, 5 LEDs Connected,

ILED(D1) Measured With 1 W Resistor,

TA = 255C

100 ms/div

0

5

10

15

20

25

0

10

20

30

40

50

60

70

80

90

100

Duty Cycle − %

f = 32 kHz

f = 1 kHz

VI = 3.6 V,

ILED max = 20 mA

PWM

ILED(D1)

0 V

PWM Into EN1 and EN2, VI = 3.6 V,

ILED = 20 mA, 5 LEDs Connected,

f = 1 kHz, TA = 255C

200 ms/div

0 A

PWM

ILED(D1)

0 V

PWM Into EN1 and EN2, VI = 3.6 V,

ILED = 20 mA, 5 LEDs Connected,

f = 32 kHz, TA = 255C

5 ms/div

0 A

TPS60230

SLVS516A – MAY 2004 – REVISED JUNE 2004

D1 LED CURRENT

vs

DUTY CYCLE

LINE TRANSIENT

Figure 7.

Figure 8.

DIMMING RESPONSE

Figure 9.

Figure 10.

8

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