MIC3202-1 datasheet(3/19 Pages) MICREL

Part #	MIC3202-1

Description	High-Brightness LED Driver with Integrated MOSFET and High-Side Current Sense

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Manufacturer	MICREL [Micrel Semiconductor]

Direct Link	http://www.micrel.com

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Micrel, Inc.

MIC3202

September 2010

3

M9999-091710-A

Absolute Maximum Ratings (1, 2)

VIN to PGND .................................................. −0.3V to +42V

VLX to PGND........................................ −0.3V to (VIN + 0.6V)

VCS to PGND ....................................... −0.3V to (VIN + 0.3V)

VEN to AGND ....................................... −0.3V to (VIN + 0.3V)

VDIM to AGND ...................................... −0.3V to (VIN + 0.3V)

VCC to PGND ................................................ −0.3V to +6.0V

PGND to AGND ..........................................

−0.3V to + 0.3V

Junction Temperature ................................................ 150

°C

Storage Temperature Range ....................

−60°C to +150°C

Lead Temperature (Soldering, 10sec) ....................... 260

°C

Operating Ratings (3)

Supply Voltage (VIN).......................................... 6.0V to 37V

Enable Voltage (VEN) .............................................. 0V to VIN

Dimming Voltage (VDIM).................................................................0V to VIN

Junction Temperature (TJ) ........................ −40°C to +125°C

Junction Thermal Resistance

SOIC (

θJA)..........................................................41°C/W

SOIC (

θJC).......................................................14.7°C/W

Electrical Characteristics (4)

VIN = VEN = VDIM = 12V; CVCC = 1.0µF; TJ = 25°C, bold values indicate −40°C ≤ TJ ≤ +125°C; unless noted.

Symbol

Parameter

Condition

Min.

Typ.

Max.

Units

Input Supply

VIN

Input Voltage Range (VIN)

6.0

37.0

V

IS

Supply Current

LX Pin = open

1.2

1.75

mA

ISD

Shut Down Current

VEN = 0V; TJ = from -40ºC to 85ºC

0.05

5

µA

UVLO

VIN UVLO Threshold

VIN Rinsing

3.2

4

4.5

V

UVLOHYS

VIN UVLO Hysteresis

500

mV

VCC Supply

VCC

VCC Output Voltage

VCS = VIN = 12V, ICC = 10mA

4.5

5

5.5

V

Current Limit

VCS(MAX)

Current-Sense Upper Threshold

VCS(MAX ) = VIN − VCS

199

212

225

mV

VCS(MIN)

Current-Sense Lower Threshold

VCS(MIN ) = VIN − VCS

165

177

189

mV

VCS Hysteresis

35

mV

VCS Rising

60

Current-Sense Response Time

VCS Falling

40

ns

VCSHYS

Current-Sense Input Current

VIN - VCS = 200mV

3

µA

Frequency

FMAX

Maximum Switching Frequency

1

MHz

Dithering (MIC3202)

VDITH

VCS Hysteresis Dithering Range

(5)

±6

mV

FDITHER

Frequency Dithering Range

(5)

% of Switching Frequency

±12

%

Enable Input

ENHI

EN Logic Level High

2.0

V

EN Logic Level Low

0.4

V

VEN = 12V

30

60

EN Bias Current

VEN = 0V

0.1

1

µA

ENLO

Start-up Time

From EN Pin going high to LX

going low

30

µs

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