- RS-stocknr.:
- 661-5349
- Fabrikantnummer:
- UC3843N
- Fabrikant:
- Texas Instruments
Tijdelijk niet op voorraad – nieuwe voorraad verwacht op 17-06-2024, met een levertijd van 1 werkdag.
Prijs Elk (in een pakket van 5)
€ 1,144
(excl. BTW)
€ 1,384
(incl. BTW)
Aantal stuks | Per stuk | Per pak* |
5 - 120 | € 1,144 | € 5,72 |
125 - 495 | € 0,786 | € 3,93 |
500 - 1245 | € 0,676 | € 3,38 |
1250 - 2495 | € 0,656 | € 3,28 |
2500 + | € 0,64 | € 3,20 |
*prijsindicatie |
- RS-stocknr.:
- 661-5349
- Fabrikantnummer:
- UC3843N
- Fabrikant:
- Texas Instruments
Datasheets
Wetgeving en compliance
Productomschrijving
Flyback Controller, Current Control, UC18/UC28/UC38 Series, Texas Instruments
The isolated-flyback power supply controller provides Constant-Voltage (CV) and Constant-Current (CC) output regulation to improve transient response to large load steps. Primary-Side Regulation (PSR) eliminates the need for an Optocoupler.
The Texas Instruments UC3843 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 under voltage lockout(UVLO), featuring a start-up current of less than 1 mA, and a precision reference trimmed for accuracy at the error amplifier input. Other internal circuits include logic to ensure latched operation, a pulse-width modulation (PWM) comparator that also provides current-limit control, and totem-pole output stage that is designed to source or sink high-peak current. The output stage, suitable for driving N-channel MOSFETs, is low when it is in the off state.
Optimized for off-line and DC-to-DC converters
Low start-up current (< 1 mA)
Automatic feedforward compensation
Pulse-by-pulse current limiting
Enhanced load-response characteristics
Under voltage lockout with hysteresis
Double-pulse suppression
High-current totem-pole output
Internally trimmed bandgap reference
Up to 500-kHz operation
Error amplifier with low output resistance
Low start-up current (< 1 mA)
Automatic feedforward compensation
Pulse-by-pulse current limiting
Enhanced load-response characteristics
Under voltage lockout with hysteresis
Double-pulse suppression
High-current totem-pole output
Internally trimmed bandgap reference
Up to 500-kHz operation
Error amplifier with low output resistance
Flyback Controllers, Texas Instruments
Current-Mode and Voltage-Mode PWM Controller
Primary-Side Regulation
Peak Power Mode
Low Power
Primary-Side Regulation
Peak Power Mode
Low Power
Specificaties
Kenmerk | Waarde |
---|---|
Maximum Switching Frequency | 500 kHz |
Output Current | 1 A |
Control Method | Current |
Number of Outputs | 1 |
Mounting Type | Through Hole |
Fall Time | 50ns |
Rise Time | 50ns |
Package Type | PDIP |
Pin Count | 8 |
Topology | Boost, Buck, Flyback, Forward |
Dimensions | 9.81 x 6.35 x 4.57mm |
Maximum Duty Cycle | 100% |
PWM Controller Type | Current Mode |
Length | 9.81mm |
Width | 6.35mm |
Height | 4.57mm |
Maximum Operating Temperature | +70 °C |
Minimum Operating Temperature | 0 °C |