DatasheetsPDF.com

TL2843B-Q1

Part Number	TL2843B-Q1
Manufacturer	Texas Instruments
Description	HIGH-PERFORMANCE CURRENT-MODE PWM CONTROLLER
Published	Feb 8, 2020
Detailed Description	TL2843B-Q1 www.ti.com SLVSAE2A – JULY 2010 – REVISED FEBRUARY 2012 HIGH-PERFORMANCE CURRENT-MODE PWM CONTROLLER Check ...
Datasheet	TL2843B-Q1 PDF File

Overview

TL2843B-Q1 www.
ti.
com SLVSAE2A – JULY 2010 – REVISED FEBRUARY 2012 HIGH-PERFORMANCE CURRENT-MODE PWM CONTROLLER Check for Samples: TL2843B-Q1 FEATURES 1 • Qualified for Automotive Applications • Low Start-Up Current (<0.
5 mA) • Trimmed Oscillator Discharge Current • Current Mode Operation to 500 kHz • Automatic Feed-Forward Compensation • Latching PWM for Cycle-by-Cycle Current Limiting • Internally Trimmed Reference With Undervoltage Lockout • High-Current Totem-Pole Output Undervoltage Lockout With Hysteresis • Double-Pulse Suppression DESCRIPTION The TL284xB 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 it is in the off state.
The TL284xB series are pin compatible with the standard TL284x with the following improvements.
The start-up current is specified to be 0.
5 mA (max), while the oscillator discharge current is trimmed to 8.
3 mA (typ).
In addition, during undervoltage lockout conditions, the output has a maximum saturation voltage of 1.
2 V while sinking 10 mA (VCC = 5 V).
Major differences between members of these series are the UVLO thresholds and maximum duty-cycle ranges.
Typical UVLO thresholds of 16 V (on) and 10 V (off) on the TL2842B and TL2844B devices make them ideally suited to off-line applications.
The corresponding typical thresholds for the TL2843B and TL2845B devices are 8.
4 V (on) and 7.
6 V (off).
The TL2842B and TL2843B devices can operate...

Similar Datasheet

TL2843B-Q1 HIGH-PERFORMANCE CURRENT-MODE PWM CONTROLLER - Texas Instruments

@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site. (Privacy Policy & Contact)