MIC2843 datasheet(3/15 Pages) MICREL

3 / 15 page

Micrel Inc.

MIC2843

November 2010

M9999-110810-B

Absolute Maximum Ratings

(1)

Main Input Voltage (VIN) .................................. −0.3V to +6V

Enable Input Voltage (VEND) ............................ −0.3V to +6V

Current Source Voltage (VD1-D6) ..................... −0.3V to +6V

Power Dissipation .....................................Internally Limited

Lead Temperature (soldering, 10sec.)....................... 260°C

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

ESD Rating

(3)................................................. ESD Sensitive

Operating Ratings

(2)

Supply Voltage (VIN)..................................... +3.0V to +5.5V

Enable Input Voltage (VEND) .................................. 0V to VIN

Current Source Voltage (VD1-D6) ............................ 0V to VIN

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

Junction Thermal Resistance

2mm x 2mm Thin MLF

®-10L (θJA)......................90°C/W

Electrical Characteristics

WLED Linear Drivers

VIN = VEND = 3.8V, RSET = 20.5kΩ; VD1-D6 = 0.6V; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ 125°C; unless noted.

Parameter

Conditions

Min.

Typ.

Max.

Units

Current Accuracy

(4)

VDROPNOM = 0.6V

1.5

Matching

(5)

VDROPNOM = 0.6V

5.5

Drop-out

Where ILED = 90% of LED current seen at

VDROPNOM = 0.6V, 100% brightness level

100

Ground/Supply Bias Current

IOUT = 20mA

1.4

Shutdown Current

(Current Source Leakage)

VEND = 0V

0.01

µA

PWM Dimming

Logic Low

0.2

Enable Input Voltage (VEND)

Logic High

1.2

Enable Input Current

VIH > 1.2V

0.01

µA

Current Source Delay

(50% levels)

Shutdown to On

Standby to On

On to Standby

RSET = 20.5k

0.5

µs

Current Source Transient Time

(10%

− 90%)

TRISE

TFALL

0.3

µs

Standby to Shutdown Time

VEND = 0V

Notes:

Exceeding the absolute maximum rating may damage the device.

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

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

As determined by average current of all channels in use and all channels loaded.

The current through each LED meets the stated limits from the average current of all LEDs.

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