Multi-Channel System Power Supply IC - BM81028AMWV

BM81028AMWV is a system power supply IC for TFT-LCD panels which are used in monitors, notebook type displays, and tablets.
This IC incorporates HAVDD, VCOM amplifier in addition to the power supply for panel driver (SOURCE, GATE, and LOGIC power supplies). Moreover, this IC has a built-in EEPROM for sequence and output voltage setting retention.

* This product is a STANDARD grade product and not recommend for on-vehicle devices.
Part Number
Unit Quantity
Minimum Package Quantity
Packing Type
BM81028AMWV-ZE2 Active UQFN28V4040P 2500 2500 Taping Yes
Grade Standard
ch 7
Vin1(Min.)[V] 2.7
Vin1(Max.)[V] 5.5
SW frequency(Max.)[MHz] 0.6
Circuit Current(Typ.)[mA] 3.2
VCOM[ch] 1
Serial I/F I2C
Operating Temperature (Min.)[°C] -40
Operating Temperature (Max.)[°C] 85
  • · Input voltage range: 2.7V to 5.5V
    · Standby current: 1.4μA (Typ)
    · Operating temperature range: -40℃to +85℃
    · Step-down DC/DC converter 2-channels (Synchronous rectification)
    · Step-up DC/DC converter (Integrated load switch and Synchronous rectification)
    · HAVDD amplifier (8bit Resolution)
    · VCOM amplifier (8bit Resolution)
    · Positive charge pump (Integrated diode)
    · Negative charge pump
    · I²C Interface Output Voltage Setting Control Function (Integrated EEPROM)
    · Switching frequency switching function (600kHz,1200kHz)
    · Protection circuits
      ·Under-Voltage Lockout
      ·Thermal Shut Down
      ·Over-Current Protection
      ·Over-Voltage Protection
      ·Short Circuit Protection (Timer Latch type)
    · Input tolerant (SCL, SDA,EN)
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Technical Data
Thermal Resistance

The definition and how to use thermal resistance and thermal characterization parameter of packages for ROHM’s integrated circuit are described in this application note.