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Portable Products

Back Light Products

Unitrode Part Number

UC3871

UC3872

Application

Zero Voltage Switched Fluorescent
Lamp Driver with LCD Bias Supply

 Zero Voltage Switched
Fluorescent Lamp Driver

Topology

Push-pull

 Push-pull

Voltage Range

4.5V to 20V

4.5V to 24V

Reference Tolerance

1.2%

1.2%

Open Lamp Detect

Y

Y

Soft Start

Y

 Y

External Synchronization

Y

Y

Shutdown Current

1mA

1mA

Maximum Frequency

200kHz

 200kHz

Lamp Intensity Control

Y

 Y

Application/Design Note

U-141, U-148

DN-75, U-141, U-148

 

Battery Charger Products

Unitrode Part Number

UC3906

UC3909

UCC3956 +

Battery Chemistry

Lead-Acid

 Lead-Acid

Lithium-Ion

Control Topology

Linear

 Switchmode

Switchmode

Reference Tolerance

1.3%

1%

1%

Temperature Compensation

Y

Y

N

Charge States

4

 4

4

Over Charge Timer

N

 N

Y

Status Bits

N

Y

Y

Average Current Mode Control

N/A

Y

Y

Application/Design Note U-104, U-131 U-155  

+ New Product

 

Battery Protection Products

Unitrode Part Number

UCC3911 +

UCC3957 +

Battery Chemistry

Lithium-Ion

Lithium-Ion

Cells Protected

2

3, 4

Threshold Tolerance

50mV

50mV

Protection FETs

Internal

External PMOS

Overcurrent Protection

Y

Y

Overcurrent Delay

Y

Y

Serial Bus

N

N

A/D

N

N

Shutdown Current

3.5mA

3.5mA

+ New Product

 

Linear Regulators

Unitrode Part Number

UCC381 +

UCC383 +

UCC384 +

Output Voltage

3.3, 5, ADJ

3.3, 5, ADJ

5, 12, ADJ

Dropout Voltage

0.45V at 1A

0.45V at 3A

0.2V at 500mA

Quiescent Current

400mA

400mA

240mA

Maximum Input Voltage

9V

9V

-16V

Shutdown Current

10mA

10mA

20mA

Voltage Tolerance

2.5%

2.5%

2.5%

Line Regulation

0.01%/V

0.01%/V

0.01%/V

+ New Product

 

Power Management Products

Unitrode Part Number

UCC3930 +

UCC3941 +

UCC39411 +

UCC3946

UCC3954 +

Description

Cellular Telephone
Power Converter

1V Synchronous Boost Converter

1V Low Power  Boost Controller

Microprocessor Supervisor with Watchdog Timer

Single Cell Lithium-Ion
to 3.3V Converter

Application

3 Integrated Positive
LDOs with Negative Supply

High Efficiency Integrated
Boost Converter

High Efficiency Low Power Synchronous Boost Conversion

Accurate Microprocessor
Supervision

High Efficiency Flyback
Converter

Key Features

  • Three Positive LDO Regulators
  • Negative Supply for MESFET Bias
  • Separate Logic Supply Enable
  • Power Good Indicator
  • Shutdown Mode
  • Full Load Startup at 1V
  • Power Limit Control
  • Auxiliary 9V Supply
  • Output Disconnect
  • Shutdown Mode
  • 200mW Output Power with Battery Voltages as low as 0.8V
  • Power Limit Control
  • Adaptive Current Mode Control
  • Auxiliary 7V Supply
  • Shutdown Mode
  • Programmable Reset Period
  • Programmable Watchdog Period
  • 1.5% Accurate Threshold
  • 4mA IDD

  • Fixed 3.3V Output
  • 750mA Output Current
  • Low Battery Warning
  • Low Battery Disconnect
  • Shutdown Mode

Application/Design Note DN-74 DN-73      

+ New Product

 

IrDA Products

Unitrode Part Number

UCC5340

UCC5341 +

UCC5342 +

UCC5343 +

UCC5344 +

Device Type

Receiver

 Receiver

Transceiver

Transceiver

Transceiver

Supply Voltage

3.3V or 5V

 3.3V or 5V

3.3V or 5V

3.3V or 5V

3.3V or 5V

Data Rate

2.4kBPS to 115.2kBPS

2.4kBPS to 115.2kBPS

2.4kBPS to 115.2kBPS

2.4kBPS to 115.2kBPS

9.6kBPS to 4mBPS

Dynamic Range

150nA to 100mA

100nA to 100mA

100nA to 100mA

100nA to 100mA

100nA to 100mA

Quiescent Current

90mA

250mA

250mA

250mA

900mA

Encoder/Decoder

N

 N

N

Y

N

IrDA Compliant

Y

Y

Y

Y

Y

LED Driver

N/A

N/A

 500mA

500mA

500mA

+ New Product

Last updatd: 05/21/98