34845 datasheet(12/21 Pages) FREESCALE

Part #	34845

Description	Low Cost 6 Channel LED Backlight Driver with Integrated Power Supply

PDF	21 Pages

Scroll/Zoom	100%

Manufacturer	FREESCALE [Freescale Semiconductor, Inc]

Direct Link	http://www.freescale.com

Logo

12 / 21 page

Analog Integrated Circuit Device Data

Freescale Semiconductor

34845

TYPICAL PERFORMANCE CURVES

INTRODUCTION

TYPICAL PERFORMANCE CURVES

Figure 6. Typical System Efficiency vs Duty Cycle (FPWM=25kHz)

Figure 7. Typical ILED Dimming Linearity (FPWM=25kHz)

0.0

10.0

20.0

30.0

40.0

50.0

60.0

70.0

80.0

90.0

100.0

4050

607080

100

Duty Cycle (%)

Vin=9V

Fs = 600kHz

L=10uH, 68mOhm (IHLP2525CZER100M01)

Schottky 5A, 100V (PDS5100HDICT-ND)

COUT = 2x2.2µF

FPWM=25kHz

Load = 9 LEDs, 20mA/channel

VLED = 27.8V, ±0.5V /channel

Chablis ILED Dimming Linearity (FPWM=25kHz)

-2.000%

-1.500%

-1.000%

-0.500%

0.000%

0.500%

1.000%

1.500%

2.000%

110

100

% Duty cycle

(-) Mismatch @ 25°C

(+) Mismatch@ 25°C

Chablis ILED Dimming Linearity (FPWM=25kHz)

-2.000%

-1.500%

-1.000%

-0.500%

0.000%

0.500%

1.000%

1.500%

2.000%

110

100

% Duty cycle

(-) Mismatch @ 25°C

(+) Mismatch@ 25°C

34845 Datasheet(PDF) 12 Page - Freescale Semiconductor, Inc

34845 Datasheet(HTML) 12 Page - Freescale Semiconductor, Inc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21

Datasheet Download

Link URL