MC34845 datasheet(7/21 Pages) FREESCALE

Numer części	MC34845

Szczegółowy opis	Low Cost 6 Channel LED Backlight Driver with Integrated Power Supply

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Producent	FREESCALE [Freescale Semiconductor, Inc]

Strona internetowa	http://www.freescale.com

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Analog Integrated Circuit Device Data

Freescale Semiconductor

7

34845

ELECTRICAL CHARACTERISTICS

STATIC AND DYNAMIC ELECTRICAL CHARACTERISTICS

LED DRIVER (CONTINUED)

Off State leakage Current, All Channels

VCH = 45 V

ICH_LEAK

-

1.0

μA

LED Channels Rise and Fall Time

tR/tF

-

50

75

ns

LED Open Protection, Channel Disabled if VCH ≤ OFDV

OFDV

-

0.55

V

LED Short Protection Voltage, Channel Disabled if VCH ≥ SFDV

(channel on time

≥ 10 μs)

SFDV

6.5

7.0

7.5

V

FAIL PIN

Off State Leakage Current

VFAIL = 5.5 V

IFAIL_LEAK

-

5.0

μA

On State Voltage Drop

ISINK = 4.0 mA

VOL

-

0.4

V

OVER-TEMPERATURE SHUTDOWN

Over-temperature Threshold (shutdown mode)

Rising

Hysteresis

OTTSHUTDOWN

150

-

165

25

-

°C

PWM INPUT

PWM Dimming Mode LED Current Control

PWM = 3.3 V, fPWM = 600 Hz 10% duty;

PWM = 3.3 V, fPWM = 600 Hz 50% duty

PWM = 3.3 V, fPWM = 600 Hz 100% duty

PWMCONTROL

9.9

49.5

-

10

50

100

10.1

50.5

-

%

Input Minimum Pulse PWM Pin (VPWM=3.3 V)

Start-up (Wake Mode)

Operational (Wake Mode)

Start-up (Enable Mode)

Operational (Enable Mode)

tPWM_IN

1.6

-

0.4

-

0.2

-

0.2

-

μs

Input Frequency Range for PWM Pin

fPWM

DC

-

100

kHz

WAKE

Shutdown Mode Timeout

tSHUTDOWN

27

30

33

ms

LOGIC INPUTS (PWM)

Input Low Voltage

VILL

-0.3

-

0.5

V

Input High Voltage

VIHL

1.5

-

5.5

V

Input Current

ISINK

-1.0

-

1.0

μA

LOGIC INPUTS (EN)

Input Low Voltage

VILL

-0.3

-

0.5

V

Input High Voltage

VIHL

2.1

-

21

V

Input Current (VEN = 12 V)

ISINK

-

6.0

10

μA

LOGIC INPUTS (WAKE)

Input Low Voltage

VILL

-0.3

-

0.5

V

Input High Voltage

VIHL

2.1

-

5.5

V

Input Current

ISINK

-1.0

-

1.0

μA

Table 3. Static and Dynamic Electrical Characteristics (continued)

Characteristics noted under conditions VIN = 12 V, VOUT = 35 V, ILED = 30 mA, fS = 600 kHz, fPWM = 600 Hz - 40°C ≤ TA ≤

85

°C, unless otherwise noted. Typical values noted reflect the approximate parameter means at TA = 25°C under nominal

conditions, unless otherwise noted.

Characteristic

Symbol

Min

Typ

Max

Unit

Podobny numer części - MC34845

Producent	Numer części	Arkusz danych	Szczegółowy opis
Freescale Semiconductor...	MC34844	1Mb / 37P	10 Channel LED Backlight Driver with Integrated Power Supply
	MC34844	2Mb / 37P	10 Channel LED Backlight Driver with Integrated Power Supply
	MC34844	2Mb / 62P	10 Channel LED Backlight Driver
	MC34844AEP	2Mb / 62P	10 Channel LED Backlight Driver with Integrated Power Supply
	MC34844AEPR2	2Mb / 62P	10 Channel LED Backlight Driver with Integrated Power Supply

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Podobny opis - MC34845

Producent	Numer części	Arkusz danych	Szczegółowy opis
Freescale Semiconductor...	34844	2Mb / 37P	10 Channel LED Backlight Driver with Integrated Power Supply
	MC34844	1Mb / 37P	10 Channel LED Backlight Driver with Integrated Power Supply
	MC34844AEP	2Mb / 62P	10 Channel LED Backlight Driver with Integrated Power Supply
	MC34844EP	2Mb / 62P	10 Channel LED Backlight Driver with Integrated Power Supply
	MC34844AEPR2	2Mb / 62P	10 Channel LED Backlight Driver with Integrated Power Supply
	34844	1Mb / 36P	10 Channel LED Backlight Driver with Integrated Power Supply
Recom International Pow...	RCOB	479Kb / 5P	Low Cost 230VAC LED Power Supply
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