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UC2845D8 - https://ti.com/content/dam/ticom/images/products/package/d/d0008a.png

UC2845D8

Active
Texas Instruments

SINGLE ENDED 500KHZ CURRENT MODE PWM CONTROLLER WITH 8.4V/7.6V UVLO 50% DUTY CYCLE, -40C TO 85C

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Search across all available documentation for this part.

DocumentsUCC38C42 Family of High-Speed BiCMOS Current-Mode PWM ControllersUnderstanding Inverting Buck-Boost Power Stages in Switch Mode Power Supplies (Rev. B)+12
UC2845D8 - https://ti.com/content/dam/ticom/images/products/package/d/d0008a.png

UC2845D8

Active
Texas Instruments

SINGLE ENDED 500KHZ CURRENT MODE PWM CONTROLLER WITH 8.4V/7.6V UVLO 50% DUTY CYCLE, -40C TO 85C

Deep-Dive with AI

DocumentsUCC38C42 Family of High-Speed BiCMOS Current-Mode PWM ControllersUnderstanding Inverting Buck-Boost Power Stages in Switch Mode Power Supplies (Rev. B)+12

Technical Specifications

Parameters and characteristics commom to parts in this series

SpecificationUC2845D8UC2845 Series
ApplicationsPWM ControllerPWM Controller
Clock Sync-False
Control Features-Frequency Control
Current - Supply11 mA11 mA
Duty Cycle (Max)-48 %
Function-Step-Down, Step-Up/Step-Down, Step-Up
Mounting TypeSurface MountSurface Mount, Through Hole
Number of Outputs-1
Operating Temperature [Max]85 °C85 - 125 °C
Operating Temperature [Min]-40 °C-40 °C
Output Configuration-Positive, Isolation Capable
Output Phases-1
Output Type-Transistor Driver
Package / Case3.9 mm0.3 - 3.9 mm
Package / Case8-SOIC8-SOIC, 16-SOIC, 14-SOIC, 8-DIP
Package / Case-3.9 mm
Package / Case-0.154 - 7.62 in
Supplier Device Package8-SOIC8-SOIC, 16-SOIC, 8-PDIP
Synchronous Rectifier-False
Topology-Buck, Forward, Boost, Flyback
Voltage - Input [Max]6.3 V6.3 V
Voltage - Input [Min]-3 V-3 V
Voltage - Supply (Vcc/Vdd)-12 V
Voltage - Supply (Vcc/Vdd)-28 V
Voltage - Supply [Max]28 V28 - 30 V
Voltage - Supply [Min]12 V7.6 - 12 V

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

DistributorPackageQuantity$
Texas InstrumentsTUBE 1$ 1.24
100$ 0.95
250$ 0.70
1000$ 0.50

UC2845 Series

IC REG CTRLR MULT TOPOLOGY 8SOIC

PartOperating Temperature [Max]Operating Temperature [Min]Package / CasePackage / CaseCurrent - SupplySupplier Device PackageVoltage - Input [Min]Voltage - Input [Max]Voltage - Supply [Min]Voltage - Supply [Max]Mounting TypeApplicationsPackage / CasePackage / CaseFunctionControl FeaturesVoltage - Supply (Vcc/Vdd) [Min]Voltage - Supply (Vcc/Vdd) [Max]Output ConfigurationSynchronous RectifierClock SyncNumber of OutputsTopologyDuty Cycle (Max) [Max]Output PhasesOutput Type
Texas Instruments
UC2845D8G4
85 °C
-40 °C
3.9 mm
8-SOIC
11 mA
8-SOIC
-3 V
6.3 V
12 V
28 V
Surface Mount
PWM Controller
Texas Instruments
UC2845ADW
85 °C
-40 °C
16-SOIC
11 mA
16-SOIC
-3 V
6.3 V
7.6 V
30 VDC
Surface Mount
PWM Controller
Texas Instruments
UC2845D
85 °C
-40 °C
14-SOIC
11 mA
-3 V
6.3 V
12 V
28 V
Surface Mount
PWM Controller
3.9 mm
0.154 in
Texas Instruments
UC2845ADTR
85 °C
-40 °C
14-SOIC
11 mA
-3 V
6.3 V
7.6 V
30 VDC
Surface Mount
PWM Controller
3.9 mm
0.154 in
Texas Instruments
UC2845AQD8R
125 °C
-40 °C
3.9 mm
8-SOIC
11 mA
8-SOIC
-3 V
6.3 V
7.9 V
30 VDC
Surface Mount
PWM Controller
Texas Instruments
UC2845AQD
125 °C
-40 °C
14-SOIC
11 mA
-3 V
6.3 V
7.9 V
30 VDC
Surface Mount
PWM Controller
3.9 mm
0.154 in
Texas Instruments
UC2845AD8TRG4
85 °C
-40 °C
3.9 mm
8-SOIC
11 mA
8-SOIC
-3 V
6.3 V
7.6 V
30 VDC
Surface Mount
PWM Controller
Texas Instruments
UC2845DTRG4
85 °C
-40 °C
14-SOIC
11 mA
-3 V
6.3 V
12 V
28 V
Surface Mount
PWM Controller
3.9 mm
0.154 in
Texas Instruments
UC2845D8TR
85 °C
-40 °C
3.9 mm
8-SOIC
11 mA
8-SOIC
-3 V
6.3 V
12 V
28 V
Surface Mount
PWM Controller
Texas Instruments
UC2845AQDR
125 °C
-40 °C
14-SOIC
11 mA
-3 V
6.3 V
7.9 V
30 VDC
Surface Mount
PWM Controller
3.9 mm
0.154 in
Texas Instruments
UC2845P
85 °C
-40 °C
0.3 in
8-DIP
8-PDIP
Through Hole
7.62 mm
Step-Down, Step-Up, Step-Up/Step-Down
Frequency Control
12 V
28 V
Isolation Capable, Positive
1
Boost, Buck, Flyback, Forward
48 %
1
Transistor Driver
Texas Instruments
UC2845AD8
85 °C
-40 °C
3.9 mm
8-SOIC
11 mA
8-SOIC
-3 V
6.3 V
7.6 V
30 VDC
Surface Mount
PWM Controller
Texas Instruments
UC2845AD8G4
85 °C
-40 °C
3.9 mm
8-SOIC
11 mA
8-SOIC
-3 V
6.3 V
7.6 V
30 VDC
Surface Mount
PWM Controller
Texas Instruments
UC2845AD
85 °C
-40 °C
14-SOIC
11 mA
-3 V
6.3 V
7.6 V
30 VDC
Surface Mount
PWM Controller
3.9 mm
0.154 in
Texas Instruments
UC2845D8TRG4
85 °C
-40 °C
3.9 mm
8-SOIC
11 mA
8-SOIC
-3 V
6.3 V
12 V
28 V
Surface Mount
PWM Controller
Texas Instruments
UC2845ANG4
85 °C
-40 °C
0.3 in
8-DIP
11 mA
8-PDIP
-3 V
6.3 V
7.6 V
30 VDC
Through Hole
PWM Controller
7.62 mm
Texas Instruments
UC2845N
85 °C
-40 °C
0.3 in
8-DIP
11 mA
8-PDIP
-3 V
6.3 V
12 V
28 V
Through Hole
PWM Controller
7.62 mm
Texas Instruments
UC2845D8
85 °C
-40 °C
3.9 mm
8-SOIC
11 mA
8-SOIC
-3 V
6.3 V
12 V
28 V
Surface Mount
PWM Controller
Texas Instruments
UC2845NG4
85 °C
-40 °C
0.3 in
8-DIP
11 mA
8-PDIP
-3 V
6.3 V
12 V
28 V
Through Hole
PWM Controller
7.62 mm

Description

General part information

UC2845 Series

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.