NXP TEA1833 | Demoboard AN11675

Description

UM10899TEA1833DB1361 45 W demo board

Features

SMPS controller IC enabling low-cost applications

• Small low-cost TSOP6 package
• Fixed switching frequency with frequency jitter to reduce ElectroMagnetic Interference(EMI)
• Frequency reduction with fixed minimum peak current to maintain high efficiency andlow output ripple at low-power output levels
• Peak power operation in CCM, increased peak current (1.4 times) and switchingfrequency (2 times)
• Slope compensation for CCM operation
• Integrated soft start
• High/low line compensation for constant overpower protection level
• Wide VCC voltage range (10.5 V to 36 V)No-load power consumption < 55 mW at 230 V (AC) possible for 65 W applications.
• Very low supply current during start and restart (11 A typical) enabling the use of ahigh-ohmic start-up resistor.
• Burst mode when the voltage on the VCC pin drops to the burst threshold level (justabove UnderVoltage LockOut (UVLO) level) to prevent a restart during prolonged noswitching. It enables using a small VCC capacitor and a high-ohmic start-up resistor.
• Low supply current during normal operation (0.58 mA typical).
• Frequency reduction at low load to maintain high efficiency at low loadAccurate OverVoltage Protection (OVP) via the ISENSE pin
• OverVoltage Protection on the VCC supply pin
• UnderVoltage LockOut (UVLO) on the VCC supply pin
• Internal OverTemperature Protection (OTP)
• External OverTemperature Protection (OTP) using 100 k NTC resistor
• Overpower time-out: 27.5 ms (TEA1833TS); 160 ms (TEA1833LTS)
• Overpower time-out during output short circuit conditions, reducing the average inputpower: 14.5 ms (TEA1833TS only)
• Restart timer after an overpower condition for low average input power at overloadand short circuit (TEA1833TS only)
• Output Short Circuit Protection (OSCP) to prevent transformer saturation duringstart-up, overload events or short circuit events
• Maximum frequency limitation at high mains to prevent unnecessary high voltage ondrain of MOSFET
• Brownin and brownout protection to avoid operation during mains undervoltageconditions
• Maximum duty cycle protection for  > 90 %Accurate OverVoltage Protection (OVP) via the ISENSE pin
• OverVoltage Protection on the VCC supply pin
• UnderVoltage LockOut (UVLO) on the VCC supply pin
• Internal OverTemperature Protection (OTP)
• External OverTemperature Protection (OTP) using 100 k NTC resistor
• Overpower time-out: 27.5 ms (TEA1833TS); 160 ms (TEA1833LTS)
• Overpower time-out during output short circuit conditions, reducing the average inputpower: 14.5 ms (TEA1833TS only)
• Restart timer after an overpower condition for low average input power at overloadand short circuit (TEA1833TS only)
• Output Short Circuit Protection (OSCP) to prevent transformer saturation duringstart-up, overload events or short circuit events
• Maximum frequency limitation at high mains to prevent unnecessary high voltage ondrain of MOSFET
• Brownin and brownout protection to avoid operation during mains undervoltageconditions
• Maximum duty cycle protection for  > 90 %

Typical applications

• LCD TVs and LCD monitors
• Ultrabooks and notebooks
• Printers

More information

• IC product information