The TEA1833TS/1X is a low-cost Switched Mode Power Supply (SMPS) controller IC intended forflyback topologies. The TEA1833TS/1X operates in peak current and frequency control mode.Frequency jitter has been implemented to reduce ElectroMagnetic Interference (EMI).Slope compensation is integrated for Continuous Conduction Mode (CCM) operation.
The TEA1833TS/1X IC features OverPower Protection (OPP). The controller accepts an overpowersituation up to 200 % for a limited amount of time.
Mains Undervoltage protection (brownin/brownout), output OverVoltage Protection (OVP),and Overtemperature Protection (OTP) can be implemented using a minimal number ofexternal components.
At low-power levels, the primary peak current is set to 22 % of the maximum peak current.The switching frequency is reduced to limit the switching losses. The combination offixed frequency operation at high output power and frequency reduction at low outputpower provides high efficiency over the total load range.
The TEA1833TS/1X makes the design of low-cost, highly efficient and reliable supplies easierby requiring a minimum number of external components. The device is especially suitedfor medium power applications.
Feature
- SMPS controller IC enabling low-cost applications
- Large input voltage range (10.5 V to 36 V)
- Integrated OverVoltage Protection (OVP) on the VCC pin
- Accurate OverVoltage Protection (OVP) via the ISENSE pin
- Dedicated burst mode, allowing a low VCC capacitor value
- Very low supply current during start-up and restart (11 µA typical)
- Low supply current during normal operation (0.58 mA typical without load)
- Adaptive internal overpower time-out
- Overpower protection including high/low line compensation
- Fixed switching frequency with frequency jitter to reduce EMI
- Frequency reduction with fixed minimum peak current to maintain high efficiency at low output power levels
- Peak power operation up to 200 % by frequency increase and peak current increase
- Slope compensation for CCM operation
- Limitation of switching frequency at high mains to reduce the maximum drain voltage
- Integrated soft-start
- Drive capability 300 mA source, 750 mA sink
- Maximum duty cycle set at 90 %
- Mains Undervoltage protection (brownin/brownout)
- Output Short Circuit Protection (OSCP), avoiding transformer saturation
- External OverTemperature Protection (OTP)
- IC overtemperature protection
- Internal VCC OVP, external OVP, internal OTP, and external OTP are latched protections; all other protections cause a restart
