UC1844 Series

Current Mode PWM Controller

Catalog

Current Mode PWM Controller

Part	Supplier Device Package [x]	Supplier Device Package [y]	Supplier Device Package	Control Features	Operating Temperature [Max]	Operating Temperature [Min]	Frequency - Switching [Max]	Topology	Voltage - Supply (Vcc/Vdd) [Min]	Voltage - Supply (Vcc/Vdd) [Max]	Package / Case	Output Phases	Output Type	Mounting Type	Output Configuration	Function	Duty Cycle (Max) [Max]	Number of Outputs	Current - Supply	Package / Case	Package / Case	Voltage - Supply [Min]	Voltage - Supply [Max]	Applications	Voltage - Input [Max]	Voltage - Input [Min]
Texas Instruments UC1844L	9	9	20-PLCC	Frequency Control	125 °C	-55 °C	500 kHz	Boost Flyback Forward	10 V	30 V	20-LCC (J-Lead)	1	Transistor Driver	Surface Mount	Isolation Capable Positive	Step-Up Step-Up/Step-Down	48 %	1
Texas Instruments 5962-8670403XA
Texas Instruments UC1844AMDREP			8-SOIC		125 °C	-55 °C					8-SOIC			Surface Mount					11 mA	0.154 in	3.9 mm	10 VDC	30 VDC	PWM Controller	6.3 V	-3 V

Catalog

Current Mode PWM Controller

Description

The UC1842A/3A/4A/5A family of control ICs is a pin-for-pin compatible improved version of the UC3842/3/4/5 family. Providing the necessary features to control current mode switched mode power supplies, this family has the following improved features. Start up current is guaranteed to be less than 0.5 mA. Oscillator discharge is trimmed to 8.3 mA. During under voltage lockout, the output stage can sink at least 10 mA at less than 1.2 V for VCC over 5 V. The UC1842A/3A/4A/5A family of control ICs is a pin-for-pin compatible improved version of the UC3842/3/4/5 family. Providing the necessary features to control current mode switched mode power supplies, this family has the following improved features. Start up current is guaranteed to be less than 0.5 mA. Oscillator discharge is trimmed to 8.3 mA. During under voltage lockout, the output stage can sink at least 10 mA at less than 1.2 V for VCC over 5 V.