3843B
Category: IC Chips
Description: HIGH-PERFORMANCE CURRENT-MODE PWM CONTROLLERS
Price range ($)
0.17830 0.56120
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3843B
3843B has several brands around the world that may have alternate names for 3843B due to regional differences or acquisition. 3843B may also be known as the following names:
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Description
3843B
Stock:9999 |
St/mot |
HIGH-PERFORMANCE CURRENT-MODE PWM CONTROLLERS |
≥1: US $0.56120 US $0.50508 ≥5: US $0.44896 US $0.40406 ≥10: US $0.25815 US $0.23234 ≥20: US $0.22448 US $0.20203 ≥50: US $0.20203 US $0.18183 ≥100: US $0.19642 US $0.17678 ≥200: US $0.19081 US $0.17173 ≥500: US $0.18520 US $0.16668 ≥1000: US $0.17958 US $0.16162
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Inquiry
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3843B
Stock:9999 |
Zilog 00+ |
HIGH-PERFORMANCE CURRENT-MODE PWM CONTROLLERS |
≥1: US $0.55720 US $0.50148 ≥5: US $0.44576 US $0.40118 ≥10: US $0.25631 US $0.23068 ≥20: US $0.22288 US $0.20059 ≥50: US $0.20059 US $0.18053 ≥100: US $0.19502 US $0.17552 ≥200: US $0.18945 US $0.17051 ≥500: US $0.18388 US $0.16549 ≥1000: US $0.17830 US $0.16047
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Inquiry
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3843B
Stock:37914 |
Zilog 00+ |
HIGH-PERFORMANCE CURRENT-MODE PWM CONTROLLERS |
≥1: US $0.55880 US $0.50292 ≥5: US $0.44704 US $0.40234 ≥10: US $0.25705 US $0.23134 ≥20: US $0.22352 US $0.20117 ≥50: US $0.20117 US $0.18105 ≥100: US $0.19558 US $0.17602 ≥200: US $0.18999 US $0.17099 ≥500: US $0.18440 US $0.16596 ≥1000: US $0.17882 US $0.16093
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Inquiry
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3843B
Stock:56 |
STMicroelectronics 07+ |
HIGH-PERFORMANCE CURRENT-MODE PWM CONTROLLERS |
≥1: US $0.44704 US $0.40234
More:
Inquiry
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3843B
Stock:420 |
St/on 07+/09+ |
HIGH-PERFORMANCE CURRENT-MODE PWM CONTROLLERS |
≥1: US $0.19558 US $0.17602
More:
Inquiry
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FEATURES
● Low Start-Up Current (<0.5mA)
● Trimmed Oscillator Discharge Current
● Current Mode Operation to 500kHz
● Automatic Feed-Forward Compensation
● Latching PWM for Cycle-by-Cycle Current Limiting
● Internally Trimmed Reference With Under voltage Lockout
● High-Current Totem-Pole Output Under voltage Lockout With Hysteresis
● Double-Pulse Suppression
DESCRIPTION/ORDERING INFORMATION
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 under voltage 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 it 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 under voltage 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 UVL0 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℃ to 85℃. The TL384xB-series deviees are characterized for operation from 0℃ to 70℃.
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