LP5523 datasheet(9/56 Pages) TI1

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6 x NICHIA NSCW100 WLED

6 x 10 mA

6 x 15 mA

VDD (V)

2.7

3.3

3.9

4.5

5.1

3 x SHARP GM5WA06270A RGB-LED

9 x 6.7 mA

9 x 10 mA

VDD (V)

2.7

3.3

3.9

4.5

5.1

3.6V

2.8V

4.2V

4.5V

VDD

VOUT

TIME (2 ms/DIV)

3.6V

2.8V

3.6V

4.2V

VDD

VOUT

TIME (2 ms/DIV)

EXTERNAL CLK (RIGHT SCALE)

INTERNAL CLK (LEFT SCALE)

750

500

250

VDD (V)

2.7

3.1

3.5

3.9

4.3

4.7

5.1

5.5

VOUT 2V/DIV

SCL

SDA

STOP CONDITION

TIME (40 Ps/DIV)

LP5523

www.ti.com

SNVS550D – SEPTEMBER 2009 – REVISED MAY 2013

Typical Performance Characteristics (continued)

Unless otherwise specified: VDD = 3.6V, CIN = COUT = 1.0 µF, C1 = C2 = 0.47 µF, TA = 25°C.

(1)

Power Save Mode Supply Current

VDD .

Serial Bus Write (51h to Addr 36h) and Charge Pump

Charge pump in 1x mode. (3)

startup Waveform. ILOAD= 60mA; VDD=3.6V

Figure 9.

Figure 10.

Line Transient and Charge Pump Automatic Gain

Change (1.5x to 1x) with 6 LEDs at 1mA / 100% PWM

Change (1x to 1.5x) with 6 LEDs at 1mA / 100% PWM

Figure 11.

Figure 12.

100% PWM RGB LED Efficiency

100% PWM WLED Efficiency

vs.

VDD

Figure 13.

Figure 14.

(3)

If the charge pump is OFF the supply current is even lower.

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