Product Summary

The TL284x and TL384x series of controlintegrated circuits provide the features that arenecessary to implement off-line or dc-to-dc fixed-frequency current-mode control schemes with a minimumnumber 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 theerror amplifier input. 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 sourceor sink high-peak current. The output stage, suitable for driving N-channel MOSFETs, is low when it is in theoff state.

Parametrics

absolute maximum ratings over operating free-air temperature range (unless otherwise noted)?:
(1)Supply voltage (see Note 1) (ICC < 30 mA):Self limiting; (2)Analog input voltage range, VI (VFB and ISENSE):-0.3 V to 6.3V; (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 (see Notes 2 and 3): D package:86℃/W; (9)Virtual junction temperature range, TJ:0℃ to 150℃; (10)Output energy (capacitive load):5μJ; (11)Lead temperature, 1,6 mm (1/16 inch) from case for 10 seconds:260℃; (12)Storage temperature range, Tstg:-65℃ to 150℃

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

<IMG border=0 src="http://www.seekic.com/uploadfile/ic-mfg/201272431744366.jpg">

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
TL3844D
TL3844D

Texas Instruments

Current Mode PWM Controllers Current-Mode PWM Controller

Data Sheet

0-1: $0.52
1-25: $0.41
25-100: $0.36
100-250: $0.32
TL3844D-8
TL3844D-8

Texas Instruments

Current Mode PWM Controllers Current-Mode PWM Controller

Data Sheet

0-1: $0.56
1-25: $0.44
25-100: $0.38
100-250: $0.33
TL3844DE4
TL3844DE4

Texas Instruments

Current Mode PWM Controllers Current-Mode PWM Controller

Data Sheet

0-1: $0.52
1-25: $0.41
25-100: $0.36
100-250: $0.32
TL3844DE4-8
TL3844DE4-8

Texas Instruments

Current Mode PWM Controllers Current-Mode PWM Controller

Data Sheet

0-1: $0.52
1-25: $0.40
25-100: $0.35
100-250: $0.31
TL3844DG4
TL3844DG4

Texas Instruments

Current Mode PWM Controllers Current-Mode PWM Controller

Data Sheet

0-1: $0.52
1-25: $0.41
25-100: $0.36
100-250: $0.32
TL3844DG4-8
TL3844DG4-8

Texas Instruments

Current Mode PWM Controllers Current-Mode PWM Controller

Data Sheet

0-1: $0.52
1-25: $0.40
25-100: $0.35
100-250: $0.31
TL3844DR
TL3844DR

Texas Instruments

Current Mode PWM Controllers Current-Mode PWM Controller

Data Sheet

0-1700: $0.22
1700-2000: $0.19
2000-2500: $0.19
2500-5000: $0.19
TL3844DRE4
TL3844DRE4

Texas Instruments

Current Mode PWM Controllers Current-Mode PWM Controller

Data Sheet

0-1700: $0.22
1700-2000: $0.19
2000-2500: $0.19
2500-5000: $0.19