General description

The TEA1833TS is a low-cost switched-mode power supply (SMPS) controller IC

intended for flyback topologies. The TEA1833TS 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 IC features overpower protection (OPP). The controller accepts an

overpower situation up to 200 for a limited time.

Mains undervoltage protection (brownin/brownout), output overvoltage protection (OVP),

and overtemperature protection (OTP) can be implemented using a minimal number of

external components.

At low-power levels, the primary peak current is set to 22 of the maximum peak

current. To limit the switching losses, the switching frequency is reduced. The

combination of fixed-frequency operation at high output power and frequency reduction at

low output power provides high efficiency over the total load range.

The TEA1833TS makes the design of low-cost, highly efficient, and reliable supplies

easier by requiring a minimum number of external components. The device is especially

suited for medium power applications.

Features and benefits

? SMPS controller IC enabling low-cost applications

? Wide 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 timeout

? 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

Applications

? All applications that require an efficient and cost-effective power supply solution. The

TEA1833TS is especially suited for medium power applications.

TEA1833TS/1屬于集成電路（IC） > AC DC 轉(zhuǎn)換器，離線開關(guān)。恩智浦半導(dǎo)體公司制造生產(chǎn)的TEA1833TS/1AC DC 轉(zhuǎn)換器，離線開關(guān)該系列是元器件級控制產(chǎn)品，用于構(gòu)建將交流市電轉(zhuǎn)換為直流電（通常電壓大幅降低）的設(shè)備。集成和未集成系統(tǒng)主要開關(guān)元件的器件均包括在內(nèi)。由于高輸入輸出電壓比，以及此類系統(tǒng)中通常需要隔離，這些器件通常與外部變壓器配合使用。盡管通常使用定制變壓器來實現(xiàn)此用途，但也有許多專門用于此用途的庫存產(chǎn)品，請參見“開關(guān)轉(zhuǎn)換器，SMPS 變壓器”標(biāo)題。