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MIC2297

40V PWM Boost Regulator White LED Driver

Status: In Production

Features:

  • 2.5V to 10V input voltage range
  • Output voltage up to 40V
  • 1.2A switch current
  • 600kHz PWM operation
  • Trimmed 200mV feedback voltage
  • Output over voltage protection (fixed or adjustable)
  • PWM brightness control
  • DAC brightness control
  • <1% line regulation
  • 1µA shutdown current
  • Over temperature protection
  • UVLO
  • -40 °C to +125 °C junction temperature range
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Overview
Documents
Development Environment
Similar Devices
RoHS Information
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Device Overview

Summary

The MIC2297 is a 600kHz PWM boost-switching regulator that is optimized for driving 6-10 series white LEDs. With its internal 40V switch and a guaranteed switch current of 1.2A, the MIC2297 easily drives a string of 10 white LEDs in series at 20mA, ensuring a high level of brightness and eliminating several ballast resistors.

The MIC2297 implements constant frequency 600kHz PWM control. The high frequency PWM operation saves board space by reducing external component sizes. The added benefit of the constant frequency PWM operation is much lower noise and input ripple injected back to the battery source than with variable frequency topologies.

To optimize efficiency, the feedback voltage is set to 200mV. This reduced voltage reduces the power dissipation in the current set resistor, and allows the lowest total output voltage, hence minimal current draw from the battery.

The MIC2297 is available with output over voltage protection that protects the IC and external components in case of open LED conditions.

The MIC2297 has a junction temperature range of -40°C to +125°C.

Additional Features
    • 2.5V to 10V input voltage range
    • Output voltage up to 40V
    • 1.2A switch current
    • 600kHz PWM operation
    • Trimmed 200mV feedback voltage
    • Output over voltage protection (fixed or adjustable)
    • PWM brightness control
    • DAC brightness control
    • <1% line regulation
    • 1µA shutdown current
    • Over temperature protection
    • UVLO
    • -40 °C to +125 °C junction temperature range
Parametrics
Name
Value
Topology
Boost
+Vin min (V)
2.5
+Vin max (V)
10
Output Current
3A BJT
Dimming
PWM / Analog
Package
VDFN
Product Type
LED Backlight
VOUT
40
llim Typ (A)
1.7
llim Max (A)
2.5
lq Typ
4.0mA
Vfb (V)
0.2
Tol Typ %
±5
Duty Cycle Max
0.93
Freq (Hz)
600K
OVP
Yes
VEN (V)
1.5
EN
Yes
Soft Start
Yes
UVLO Typ (V)
2.1
Ceramic Cap
Yes
Θja (C/W)
65

Documents

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User Guides

Development Environment

  • Demo & Evaluation Boards
Demo & Evaluation Boards
MIC2297-42YML Evaluation Board
MIC2297-42YML Evaluation Board ( MIC2297-42YML-EV )

The MIC2297 is a 600kHz PWM White LED Driver optimized for 6 to 10 series WLEDs. With an output voltage of up to 42V and a guaranteed 1.2A on the internal power switch, the MIC2297 can easily drive 10 WLEDs at 20mA continuous current. The MIC2297 features WLED brightness control using the BRT pin and has output over voltage protection (OVP) to protect the device in case the WLEDs are disconnected...

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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
MIC2297-38YML-TR
0.015900
0.077910
10
VDFN
2.5x2.5x0.9mm
NiPdAu
e4
MIC2297-42YML-TR
0.015900
0.077910
10
VDFN
2.5x2.5x0.9mm
NiPdAu
e4
MIC2297-15YML-TR
0.015900
0.077910
10
VDFN
2.5x2.5x0.9mm
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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