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TLED2043

Features: `Integrated FETs with Low RDS-ON . . . 6 Max`Current-Controlled Output Drives That Are Proportional to Battery Voltage to Save Power`Integrated Power-Supply Switches for Power Savings During OFF State . . . 1 A Max`Up to 89% Efficiency`Applications: LCD Display for Cell Phones, PDAs, Pa...

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SeekIC No. : 004521069 Detail

TLED2043: Features: `Integrated FETs with Low RDS-ON . . . 6 Max`Current-Controlled Output Drives That Are Proportional to Battery Voltage to Save Power`Integrated Power-Supply Switches for Power Savings Dur...

TLED2043 Data Sheet

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Part Number:
TLED2043
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

`Integrated FETs with Low RDS-ON . . . 6 Max
`Current-Controlled Output Drives That Are Proportional to Battery Voltage to Save Power
`Integrated Power-Supply Switches for Power Savings During OFF State . . . 1 A Max
`Up to 89% Efficiency
`Applications: LCD Display for Cell Phones, PDAs, Palmtops, etc.


Specifications

Switch input voltage: VIN1, VIN2, VIN3 (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 V
Switch output current: IOUT1, IOUT2, IOUT3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15 mA
Amplifier input voltage, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VDD
Output FET drain-source voltage, VDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
Output FET drain current, ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50 mA
Package thermal impedance, JA (see Notes 2 and 3): GQN package . . . . . . . . . . . . . . . . . . . . . . . . . 78/W
PW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83/W
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . 260
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65 to 150
† Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. All voltage values are with respect to the network ground terminal.
2. Maximum power dissipation is a function of TJ(max), JA, and TA. The maximum allowable power dissipation at any allowable
ambient temperature is PD = (TJ(max) TA)/JA. Operating at the absolute maximum TJ of 150 can affect reliability.
3. The package thermal impedance is calculated in accordance with JESD 51-7.


Description

The TLED2043 is a four-channel, white LED driver used for backlighting color LCD displays in portable equipment. The device consists of four FET outputs, each of which is used essentially as a current sink to bias a single LED. The gates of the FETs are controlled collectively by a current-control amplifier that automatically monitors the battery voltage. If the battery voltage drops when compared to an externally set reference voltage, the current-control amplifier proportionately lowers all four FETs' output drives to conserve battery power. Additionally, the TLED2043 has internal switches that are programmed to disconnect the power supply and supporting circuitry to the device when LED operation is not needed, offering significant power savings during periods of inactivity.

Offering smaller board space, lower RDS-ON, and lower overall cost, the TLED2043 has clear advantages over the use of discrete devices in implementing a white-LED driver solution. Compared to the use of charge pumps and dc-dc converters in similar applications, the TLED2043 again can offer the advantages of smaller board space and lower solution cost because no costly inductors and/or capacitors are required. In addition, it avoids the switching-noise and power-loss issues associated with such devices.

Characterized for operation from 40 to 85, the TLED2043 is offered in 20-pin TSSOP (PW) and MicroStar Jr. BGA (GQN) packages for maximum space savings.




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