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MIC2287C

White LED Driver w/ 34V OVP

Status: In Production

Features:

  • 2.5V to 10V input voltage
  • Output voltage up to 34V
  • Over 500mA switch current
  • 1.2 MHz PWM operation
  • 95mV feedback voltage
  • Output over voltage protection (OVP)
  • Options for 15V, 24V, and 34V OVP
  • Over-temperature protection
  • UVLO
  • Low profile Thin SOT-23-5 package option
  • -40°C to +105°C junction temperature range
  • For higher performance specifications see the MIC2287
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Overview
Documents
Development Environment
Similar Devices
RoHS Information
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Device Overview

Summary

The MIC2287C is a 1.2MHz pulse width modulated (PWM), boost-switching regulator that is optimized for constant-current, white LED driver applications. With a maximum output voltage of 34V and a switch current of over 500mA, the MIC2287C easily drives a string of up to eight white LEDs in series, ensuring uniform brightness and eliminating several ballast resistors.

The MIC2287C implements a constant frequency, 1.2MHz PWM control scheme. The high frequency PWM operation saves board space by reducing external component sizes. The added benefit of the constant frequency PWM scheme as opposed to variable frequency topologies is much lower noise and input ripple injected back to the battery source.

To optimize efficiency, the feedback voltage is set to only 95mV. This reduces the power dissipation in the current set resistor and allows the lowest total output voltage, hence minimal current draw from the battery.

The MIC2287C is available with three levels of overvoltage protection, 15V, 24V, and 34V. This allows designers to choose the smallest possible external components with the appropriate voltage ratings for their applications.

The MIC2287C has a junction temperature range of -40°C to +105°C.

Additional Features
    • 2.5V to 10V input voltage
    • Output voltage up to 34V
    • Over 500mA switch current
    • 1.2 MHz PWM operation
    • 95mV feedback voltage
    • Output over voltage protection (OVP)
    • Options for 15V, 24V, and 34V OVP
    • Over-temperature protection
    • UVLO
    • Low profile Thin SOT-23-5 package option
    • -40°C to +105°C junction temperature range
    • For higher performance specifications see the MIC2287
Parametrics
Name
Value
Topology
Boost
+Vin min (V)
2.5
+Vin max (V)
10
Output Current
2A BJT
Dimming
PWM / Analog
Package
TSOT, VDFN
Product Type
LED Backlight
VOUT
34
llim Typ (A)
0.75
lq Typ
2.5mA
Vfb (V)
0.095
Tol Typ %
±10
Duty Cycle Max
0.9
Freq (Hz)
1.2M
OVP
Yes
VEN (V)
1.5
EN
Yes
Soft Start
Yes
UVLO Typ (V)
2.1
Ceramic Cap
Yes
Θja (C/W)
252, 90

Documents

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RoHS Information

Part Number
Device Weight (g)
Shipping Weight (grams)
Lead Count
Package Type
Package Width
Solder Composition
JEDEC Indicator
RoHS
China EFUP
MIC2287CYD5-TX
0.012600
0.149200
5
TSOT
-
NiPdAu
e4
MIC2287CYD5-TR
0.012600
0.149200
5
TSOT
-
NiPdAu
e4
MIC2287C-15YML-TR
0.010900
0.339227
8
VDFN
2x2x0.9mm
NiPdAu
e4
MIC2287C-24YML-TR
0.010900
0.339227
8
VDFN
2x2x0.9mm
NiPdAu
e4
MIC2287C-34YML-TR
0.010900
0.339227
8
VDFN
2x2x0.9mm
NiPdAu
e4
To see a complete listing of RoHS data for this device, please Click here
Shipping Weight = Device Weight + Packing Material weight. Please contact sales office if device weight is not available.

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