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UC2844 Series

Single ended 500KHz current mode PWM controller with 16V/10V UVLO 50% duty cycle, -40C to 85C

Manufacturer: Texas Instruments

Catalog(15 parts)

PartCurrent - SupplyMounting TypeApplicationsPackage / CasePackage / CasePackage / CaseVoltage - InputVoltage - InputVoltage - SupplyVoltage - SupplyOperating TemperatureOperating TemperatureSupplier Device PackagePackage / CaseDuty Cycle (Max)Voltage - Supply (Vcc/Vdd)Voltage - Supply (Vcc/Vdd)Control FeaturesSynchronous RectifierClock SyncOutput ConfigurationNumber of OutputsTopologyFunctionOutput TypeOutput Phases
Texas Instruments
UC2844ADTR
Power Supply Controller PWM Controller 14-SOIC
0.010999999940395355 A
Surface Mount
PWM Controller
0.003899999894201755 m
0.003911599982529879 m
14-SOIC
-3 V
6.300000190734863 V
30 V
10 V
85 °C
-40 °C
Texas Instruments
UC2844D8TR
Power Supply Controller PWM Controller 8-SOIC
0.010999999940395355 A
Surface Mount
PWM Controller
8-SOIC
-3 V
6.300000190734863 V
28 V
12 V
85 °C
-40 °C
8-SOIC
0.003899999894201755 m
Texas Instruments
UC2844D
Power Supply Controller PWM Controller 14-SOIC
0.010999999940395355 A
Surface Mount
PWM Controller
0.003899999894201755 m
0.003911599982529879 m
14-SOIC
-3 V
6.300000190734863 V
28 V
12 V
85 °C
-40 °C
Texas Instruments
UC2844DTR
Power Supply Controller PWM Controller 14-SOIC
0.010999999940395355 A
Surface Mount
PWM Controller
0.003899999894201755 m
0.003911599982529879 m
14-SOIC
-3 V
6.300000190734863 V
28 V
12 V
85 °C
-40 °C
Texas Instruments
UC2844AQD8R
Power Supply Controller PWM Controller 8-SOIC
0.010999999940395355 A
Surface Mount
PWM Controller
8-SOIC
-3 V
6.300000190734863 V
30 V
10 V
85 °C
-40 °C
8-SOIC
0.003899999894201755 m
Texas Instruments
UC2844ADTRG4
Power Supply Controller PWM Controller 14-SOIC
0.010999999940395355 A
Surface Mount
PWM Controller
0.003899999894201755 m
0.003911599982529879 m
14-SOIC
-3 V
6.300000190734863 V
30 V
10 V
85 °C
-40 °C
Texas Instruments
UC2844D8G4
Power Supply Controller PWM Controller 8-SOIC
0.010999999940395355 A
Surface Mount
PWM Controller
8-SOIC
-3 V
6.300000190734863 V
28 V
12 V
85 °C
-40 °C
8-SOIC
0.003899999894201755 m
Texas Instruments
UC2844N
Regulator Output DC-DC Controller IC 8-PDIP
Through Hole
0.007619999814778566 m
8-DIP
85 °C
-40 °C
8-PDIP
0.007619999814778566 m
Texas Instruments
UC2844P
Boost, Buck, Flyback, Forward Regulator Positive, Isolation Capable Output Step-Up, Step-Down, Step-Up/Step-Down DC-DC Controller IC 8-PDIP
Through Hole
0.007619999814778566 m
8-DIP
85 °C
-40 °C
8-PDIP
0.007619999814778566 m
0.47999998927116394 ul
12 V
28 V
Frequency Control
Isolation Capable, Positive
1 ul
Boost, Buck, Flyback, Forward
Step-Down, Step-Up, Step-Up/Step-Down
Transistor Driver
1 ul
Texas Instruments
UC2844AQDR
Power Supply Controller PWM Controller 14-SOIC
0.010999999940395355 A
Surface Mount
PWM Controller
0.003899999894201755 m
0.003911599982529879 m
14-SOIC
-3 V
6.300000190734863 V
30 V
10 V
85 °C
-40 °C
Texas Instruments
UC2844DG4
Power Supply Controller PWM Controller 14-SOIC
0.010999999940395355 A
Surface Mount
PWM Controller
0.003899999894201755 m
0.003911599982529879 m
14-SOIC
-3 V
6.300000190734863 V
28 V
12 V
85 °C
-40 °C
Texas Instruments
UC2844ANG4
Power Supply Controller PWM Controller 8-PDIP
0.010999999940395355 A
Through Hole
PWM Controller
0.007619999814778566 m
8-DIP
-3 V
6.300000190734863 V
30 V
10 V
85 °C
-40 °C
8-PDIP
0.007619999814778566 m
Texas Instruments
UC2844AQD
Power Supply Controller PWM Controller 14-SOIC
0.010999999940395355 A
Surface Mount
PWM Controller
0.003899999894201755 m
0.003911599982529879 m
14-SOIC
-3 V
6.300000190734863 V
30 V
10 V
85 °C
-40 °C
Texas Instruments
UC2844AQD8
Power Supply Controller PWM Controller 8-SOIC
0.010999999940395355 A
Surface Mount
PWM Controller
8-SOIC
-3 V
6.300000190734863 V
30 V
10 V
85 °C
-40 °C
8-SOIC
0.003899999894201755 m
Texas Instruments
UC2844NG4
Power Supply Controller PWM Controller 8-PDIP
0.010999999940395355 A
Through Hole
PWM Controller
0.007619999814778566 m
8-DIP
-3 V
6.300000190734863 V
28 V
12 V
85 °C
-40 °C
8-PDIP
0.007619999814778566 m

Key Features

Optimized for off-line and DC-to-DC convertersLow start-up current (< 1mA)Automatic feedforward compensationPulse-by-pulse current limitingEnhanced load-response characteristicsUndervoltage lockout with hysteresisDouble-pulse suppressionHigh-current totem-pole outputInternally trimmed bandgap referenceUp to 500kHz operationError amplifier with low output resistanceOptimized for off-line and DC-to-DC convertersLow start-up current (< 1mA)Automatic feedforward compensationPulse-by-pulse current limitingEnhanced load-response characteristicsUndervoltage lockout with hysteresisDouble-pulse suppressionHigh-current totem-pole outputInternally trimmed bandgap referenceUp to 500kHz operationError amplifier with low output resistance

Description

AI
The UCx84x series of control integrated circuits provide the features that are necessary to implement off-line or DC-to-DC fixed-frequency current-mode control schemes, with a minimum number of external components. The internally implemented circuits include an undervoltage lockout (UVLO), featuring a start-up current of less than 1mA, and a precision reference trimmed for accuracy at the error amplifier input. Other internal circuits include logic to provide latched operation, a pulse-width modulation (PWM) comparator that also provides current-limit control, and a totem-pole output stage that is designed to source or sink high-peak current. The output stage, designed for driving N-channel MOSFETs, is low when the output stage is in the off state. The UCx84x family offers a variety of package options, temperature range options, choice of maximum duty cycle, and choice of turnon and turnoff thresholds and hysteresis ranges. Devices with higher turnon or turnoff hysteresis are good choices for off-line power supplies, while the devices with a narrower hysteresis range are designed for DC-DC applications. The UC184x devices are specified for operation from –55°C to 125°C, the UC284x series is specified for operation from –40°C to 85°C, and the UC384x series is specified for operation from 0°C to 70°C. The UCx84x series of control integrated circuits provide the features that are necessary to implement off-line or DC-to-DC fixed-frequency current-mode control schemes, with a minimum number of external components. The internally implemented circuits include an undervoltage lockout (UVLO), featuring a start-up current of less than 1mA, and a precision reference trimmed for accuracy at the error amplifier input. Other internal circuits include logic to provide latched operation, a pulse-width modulation (PWM) comparator that also provides current-limit control, and a totem-pole output stage that is designed to source or sink high-peak current. The output stage, designed for driving N-channel MOSFETs, is low when the output stage is in the off state. The UCx84x family offers a variety of package options, temperature range options, choice of maximum duty cycle, and choice of turnon and turnoff thresholds and hysteresis ranges. Devices with higher turnon or turnoff hysteresis are good choices for off-line power supplies, while the devices with a narrower hysteresis range are designed for DC-DC applications. The UC184x devices are specified for operation from –55°C to 125°C, the UC284x series is specified for operation from –40°C to 85°C, and the UC384x series is specified for operation from 0°C to 70°C.