MIC3230_1 datasheet(4/19 Pages) MICREL

Part #	MIC3230

Description	Constant Current Boost Controller for Driving High Power LEDs

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Manufacturer	MICREL [Micrel Semiconductor]

Direct Link	http://www.micrel.com

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Micrel, Inc.

MIC3230/1/2

November 2009

4

M9999-113009-B

Absolute Maximum Ratings

(1)

Supply Voltage (VIN).....................................................+48V

Enable Pin Voltage........................................... -0.3V to +6V

IADJ Voltage ..................................................................+6V

Lead Temperature (soldering, sec.)........................... 260°C

Storage Temperature (Ts)..........................-65°C to +150°C

ESD Rating

(3)

MIC3230 ....................................... 1500V HB, 100VMM

MIC3232 ........................................... 2kV HB, 100VMM

MIC3231 ....................................... 1500V HB, 150VMM

Operating Ratings

(2)

Supply Voltage (VIN)......................................... +6V to +45V

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

Junction Thermal Resistance

MSOP (

θJA) ...................................................130.5°C/W

EPAD TSSOP (

θJA).........................................36.5°C/W

MLF

® (θJA).......................................................60.7°C/W

Electrical Characteristics

(4)

VIN = 12V; VEN = 3.6V; L = 47µH; C = 4.7µF; TJ = 25°C, Bold values indicate –40°C≤ TJ ≤ +125°C, unless noted.

Symbol

Parameter

Condition

Min

Typ

Max

Units

VIN

Supply Voltage Range

6

45

V

UVLO

Under Voltage Lockout

3.5

4.9

5.5

V

IVIN

Quiescent Current

VFB > 275mV (to ensure device is not

switching)

3.2

10

mA

ISD

Shutdown Current

VEN = 0V

30

µA

Room temperature (3%)

242.5

250

257.5

mV

VIADJ

Feedback Voltage (at IADJ)

–40°C≤ TJ ≤ +125°C (5%)

237.5

250

262.5

mV

IADJ

Feedback Input Current

VFB = 250mV

1.2

3

µA

Line Regulation

VIN = 12V to 24V

2

%

Load Regulation

VOUT to 2 × VOUT

2

%

DMAX

Maximum Duty Cycle

MIC3230 & MIC3232

MIC3231

90

88

%

VEN

Enable Threshold

Turn ON

Turn OFF

1.5

1.15

1.1

0.4

V

IEN

Enable Pin Current

VEN = 3.3V

REN = 100kΩ

17

30

µA

VPWM

PWMD Threshold

Turn ON

Turn OFF

1.5

0.75

0.7

0.4

V

fPWMD

PWMD Frequency Range

Note 5

(L = 47µH; C = 4.7µF)

0

500

Hz

fSW

Programmable Oscillator

Frequency

RFREQ = 82.5kΩ

RFREQ = 21kΩ

RFREQ = 8.25kΩ

360

109

400

950

440

kHz

fSW

Fixed Frequency Option

(MIC3232YMM)

360

400

440

kHz

FDITHER

Low EMI (MIC3231)

Frequency dither shift from nominal

±12

%

VSENS

Current Limit Threshold Voltage

RSENSE = 390Ω

0.315

0.45

0.585

V

ISENSE

ISENSE Peak Current Out

RSENSE = 390Ω

250

µA

Notes:

1. Exceeding the absolute maximum rating may damage the device.

2. The device is not guaranteed to function outside its operating rating.

3. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5kΩ in series with 100pF.

4. Specification for packaged product only.

5. Guaranteed by design

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