Specification	TL2843BP

Clock Sync	False
Control Features	Frequency Control
Duty Cycle (Max) [Max]	96 %
Function	Step-Up, Step-Up/Step-Down
Mounting Type	Through Hole
Number of Outputs	1
Operating Temperature [Max]	85 °C
Operating Temperature [Min]	-40 °C
Output Configuration	Positive
Output Phases	1
Output Type	Transistor Driver
Package / Case	0.3 in
Package / Case	8-DIP
Package / Case	7.62 mm
Supplier Device Package	8-PDIP
Synchronous Rectifier	False
Topology	Boost, Flyback, Forward
Voltage - Supply (Vcc/Vdd) [Max]	30 V
Voltage - Supply (Vcc/Vdd) [Min]	7.6 V

TL2843B-Q1 Series

30V, 0.2A high Performance 500KHz current mode PWM with 8.4V/7.6V UVLO, 100% duty cycle, -40C to 85C

Part	Operating Temperature [Max]	Operating Temperature [Min]	Output Type	Output Phases	Number of Outputs	Output Configuration	Package / Case	Package / Case [y]	Package / Case [x]	Mounting Type	Supplier Device Package	Topology	Voltage - Supply (Vcc/Vdd) [Min]	Voltage - Supply (Vcc/Vdd) [Max]	Function	Control Features	Duty Cycle (Max) [Max]	Grade	Qualification	Package / Case	Package / Case
Texas Instruments TL2843D-8	85 °C	-40 °C	Transistor Driver	1	1	Positive	8-SOIC	3.9 mm	0.154 in	Surface Mount	8-SOIC	Boost Flyback Forward	7.6 V	30 V	Step-Up Step-Up/Step-Down	Frequency Control	97 %
Texas Instruments TL2843BDRG4-8	85 °C	-40 °C	Transistor Driver	1	1	Positive	8-SOIC	3.9 mm	0.154 in	Surface Mount	8-SOIC	Boost Flyback Forward	7.6 V	30 V	Step-Up Step-Up/Step-Down	Frequency Control	96 %
Texas Instruments TL2843BD	85 °C	-40 °C	Transistor Driver	1	1	Positive	14-SOIC	3.9 mm	0.154 in	Surface Mount		Boost Flyback Forward	7.6 V	30 V	Step-Up Step-Up/Step-Down	Frequency Control	96 %
Texas Instruments TL2843DRG4-8	85 °C	-40 °C	Transistor Driver	1	1	Positive	8-SOIC	3.9 mm	0.154 in	Surface Mount	8-SOIC	Boost Flyback Forward	7.6 V	30 V	Step-Up Step-Up/Step-Down	Frequency Control	97 %
Texas Instruments TL2843D	85 °C	-40 °C	Transistor Driver	1	1	Positive	14-SOIC	3.9 mm	0.154 in	Surface Mount		Boost Flyback Forward	7.6 V	30 V	Step-Up Step-Up/Step-Down	Frequency Control	97 %
Texas Instruments TL2843BD-8	85 °C	-40 °C	Transistor Driver	1	1	Positive	8-SOIC	3.9 mm	0.154 in	Surface Mount	8-SOIC	Boost Flyback Forward	7.6 V	30 V	Step-Up Step-Up/Step-Down	Frequency Control	96 %
Texas Instruments TL2843BQDRQ1	125 ¯C	-40 °C	Transistor Driver	1	1	Positive	14-SOIC	3.9 mm	0.154 in	Surface Mount		Boost Flyback Forward	7.6 V	30 V	Step-Up Step-Up/Step-Down	Frequency Control	96 %	Automotive	AEC-Q100
Texas Instruments TL2843BP	85 °C	-40 °C	Transistor Driver	1	1	Positive	8-DIP			Through Hole	8-PDIP	Boost Flyback Forward	7.6 V	30 V	Step-Up Step-Up/Step-Down	Frequency Control	96 %			0.3 in	7.62 mm
Texas Instruments TL2843P	85 °C	-40 °C	Transistor Driver	1	1	Positive	8-DIP			Through Hole	8-PDIP	Boost Flyback Forward	7.6 V	30 V	Step-Up Step-Up/Step-Down	Frequency Control	97 %			0.3 in	7.62 mm
Texas Instruments TL2843BDR-8	85 °C	-40 °C	Transistor Driver	1	1	Positive	8-SOIC	3.9 mm	0.154 in	Surface Mount	8-SOIC	Boost Flyback Forward	7.6 V	30 V	Step-Up Step-Up/Step-Down	Frequency Control	96 %

Pricing

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

Distributor	Package	Quantity	$

Digikey	Tube	1	$ 0.91
		10	$ 0.80
		50	$ 0.75
		100	$ 0.61
		250	$ 0.57
		500	$ 0.48
		1000	$ 0.39
		2500	$ 0.35
		5000	$ 0.33
Texas Instruments	TUBE	1	$ 0.76
		100	$ 0.52
		250	$ 0.40
		1000	$ 0.26

Description

General part information

TL2843B-Q1 Series

The TL284xB and TL384xB 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. Internally implemented circuits include an undervoltage lockout (UVLO) and a precision reference that is 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 a totem-pole output stage designed to source or sink high-peak current. The output stage, suitable for driving N-channel MOSFETs, is low when the output stage is in the off state.

The TL284xB and TL384xB series are pin compatible with the standard TL284x and TL384x with the following improvements. The start-up current is specified to be 0.5mA (max), while the oscillator discharge current is trimmed to 8.3mA (typ). In addition, during undervoltage lockout conditions, the output has a maximum saturation voltage of 1.2V while sinking 10mA (VCC = 5V).

Major differences between members of these series are the UVLO thresholds and maximum duty-cycle ranges. Typical UVLO thresholds of 16V (on) and 10V (off) on the TLx842B and TLx844B devices make them ideally suited to off-line applications. The corresponding typical thresholds for the TLx843B and TLx845B devices are 8.4V (on) and 7.6V (off). The TLx842B and TLx843B devices can operate to duty cycles approaching 100%. A duty-cycle range of 0% to 50% is obtained by the TLx844B and TLx845B by the addition of an internal toggle flip-flop, which blanks the output off every other clock cycle. The TL284xB-series devices are characterized for operation from –40°C to 85°C. The TL384xB-series devices are characterized for operation from 0°C to 70°C.