The TEA1732LTS is a low cost Switched Mode Power Supply (SMPS) controller ICintended for flyback topologies. The TEA1732LTS operates in peak current and frequencycontrol mode. Frequency jitter has been implemented to reduce ElectroMagneticInterference (EMI). Slope compensation is integrated for Continuous Conduction Mode(CCM) operation.

The TEA1732LTS IC features OverPower Protection (OPP). The controller accepts anoverpower situation for a limited amount of time.

Mains undervoltage protection (brownout), output OverVoltage Protection (OVP), andOverTemperature Protection (OTP) can be implemented using a minimal number ofexternal components.

At low-power levels, the primary peak current is set to 25 % of the maximum peak current.The switching frequency is reduced to limit the switching losses. The combination of fixedfrequency operation at high output power and frequency reduction at low output powerprovides high efficiency over the total load range.

The TEA1732LTS makes the design of low-cost, highly efficient and reliable supplies forpower requirements up to 75 W easier by requiring a minimum number of externalcomponents.

TEA1732TS TEA1732LTS TEA1732CTS OPP Safe restart Latched to off Safe restart UVLO Safe restart Latched to off Safe restart Brownout Safe restart Safe restart Safe restart Max Duty cycle Safe restart Safe restart Safe restart OVP Latched to off Latched to off Safe restart Ext. OTP Latched to off Latched to off Safe restart Int. OTP Latched to off Latched to off Latched to off

• SMPS controller IC enabling low-cost applications
• Large input voltage range (12 V to 30 V)
• Integrated OverVoltage Protection (OVP) on the VCC pin
• Accurate OverVoltage Protection (OVP) via the ISENSE pin
• Very low supply current during start-up and restart (10 μA typical)
• Low supply current during normal operation (0.58 mA typical without load)
• Internal overpower time-out
• Overpower protection or high/low line compensation
• Fixed switching frequency with frequency jitter to reduce EMI
• Frequency reduction with fixed minimum peak current to maintain high efficiency atlow output power levels
• Frequency increase at peak power operation
• Slope compensation for CCM operation
• Integrated soft-start
• Low and adjustable OverCurrent Protection (OCP) trip level
• Mains undervoltage protection (brownout)
• External OverTemperature Protection (OTP)
• IC overtemperature protection

• All applications that require an efficient and cost-effective power supply solution up to75 W.