NXP UM10886

Description

This user manual describes the TEA1720ADB1180 10 W ConstantVoltage/Constant Current (CV/CC) universal input power supply for tabletadapters/chargers. This demo board is based on the GreenChip SmartPower TEA1720B3T and the TEA1705 transient controller. The TEA1720B3T and TEA1705 application enables a no-load power consumption of less than 20 mW and a low external component count for cost-effective applications. In addition, the TEA1720B3T provides advanced control modes for optimal performance. The TEA1705 transient controller continuously monitors the output voltage. When the output voltage drops below the detection level Vdet (VCC), a transient interrupt signal is generated to wake up the TEA1720B3T.

Features

• Power features
• Low component count for cost-effective design
• Universal mains input
• Isolated output
• Highly efficient > 80 %
• Primary sensing for control of the output voltage without optocoupler and secondaryfeedback circuitry
• Built-in emitter switch for driving low-cost NPN high-voltage transistor
• Minimizes audible noise in all operation modes
• Energy Star 2.0 compliant
• Jitter function for reduced EMI
• Excellent transient performance with ultra low no-load power and small output capacitors
• Cable compensation 0.3 V at maximum power
• Green features
• No-load power consumption < 20 mW
• Very low supply current in no-load condition with energy save mode
• Incorporates a high-voltage start-up circuit with zero current consumption under normal switching operation
• Protection features
• OverVoltage Protection (OVP) with auto-restart
• UnderVoltage LockOut (UVLO) and OverVoltage Protection (OVP) on IC supply pin
• OverTemperature Protection (OTP)
• Sense pin short protection
• Hiccup function for automatic switch-off at continuous too low output voltage
• Demagnetization protection for guaranteed discontinuous conduction mode operation
• Open and short-circuit protection of the Feedback control (FB) pin
• Short-circuit protection of the charger output

Remarks:L101=100uHL102=10uH

More information

• Datasheet
• IC product information