Product Summary

The TL2843P is a current-mode pwm controller. It provides 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. Some of the internally implemented circuits are an undervoltage lockout (UVLO), featuring a start-up current of less than 1 mA, and a precision reference trimmed for accuracy at the error amplifier input. The TL2843P can operate to duty cycles approaching 100%. Other internal circuits include logic to ensure latched operation, a pulse-width modulation (PWM) comparator (which also provides current-limit control), and a totem-pole output stage designed to source or sink high-peak current. The TL2843P is characterized for operation from 0℃ to 70℃.

Parametrics

TL2843P absolute maximum ratings: (1)Supply voltage(ICC < 30 mA): Self limiting; (2)Analog input voltage range, VI (VFB and ISENSE): –0.3 V to 6.3 V; (3)Output voltage, VO (OUTPUT): 35 V; (4)Input voltage, VI, (VC, D package only): 35 V; (5)Supply current, ICC: 30 mA; (6)Output current, IO: ±1 A; (7)Error amplifier output sink current: 10 mA; (8)Package thermal impedance, θJA: 86℃/W; (9)Virtual junction temperature range, TJ: 0℃ to 150℃; (10)Output energy (capacitive load): 5 mJ; (11)Lead temperature, 1,6 mm (1/16 inch) from case for 10 seconds: 260℃; (12)Storage temperature range, Tstg: –65℃ to 150℃.

Features

TL2843P features: (1)Optimized for Off-Line and dc-to-dc Converters; (2)Low Start-Up Current (<1 mA); (3)Automatic Feed-Forward Compensation; (4)Pulse-by-Pulse Current Limiting; (5)Enhanced Load-Response Characteristics; (6)Undervoltage Lockout With Hysteresis; (7)Double-Pulse Suppression; (8)High-Current Totem-Pole Output; (9)Internally Trimmed Bandgap Reference; (10)500-kHz Operation; (11)Error Amplifier With Low Output Resistance; (12)Designed to Be Interchangeable With UC2842 and UC3842 Series.

Diagrams

TL2843P block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
TL2843PE4
TL2843PE4

Texas Instruments

Current Mode PWM Controllers Current-Mode PWM Controller

Data Sheet

0-1: $0.58
1-25: $0.46
25-100: $0.42
100-250: $0.35
TL2843P
TL2843P

Texas Instruments

Current Mode PWM Controllers Current-Mode PWM Controller

Data Sheet

0-1: $0.64
1-25: $0.51
25-100: $0.45
100-250: $0.35