Automotive Current Mode PWM Controller
CS2841B
Automotive Current Mode PWM Control Circuit
The CS2841B provides all the necessary features to implement off-lin...
Description
CS2841B
Automotive Current Mode PWM Control Circuit
The CS2841B provides all the necessary features to implement off-line fixed frequency current-mode control with a minimum number of external components.
The CS2841B (a variation of the CS2843A) is designed specifically for use in automotive operation. The low start threshold voltage of 8.0 V (typ), and the ability to survive 40 V automotive load dump transients are important for automotive subsystem designs. The CS2841 series has a history of quality and reliability in automotive applications.
The CS2841B incorporates a precision temperature-controlled oscillator with an internally trimmed discharge current to minimize variations in frequency. Duty-cycles greater than 50% are also possible. On board logic ensures that VREF is stabilized before the output stage is enabled. Ion implant resistors provide tighter control of undervoltage lockout.
Features
ăOptimized for Off-Line Control ăInternally Trimmed Temperature Compensated Oscillator ăMaximum Duty-Cycle Clamp ăVREF Stabilized Before Output Stage Enabled ăLow Start-Up Current ăPulse-By-Pulse Current Limiting ăImproved Undervoltage Lockout ăDouble Pulse Suppression ă1.0 % Trimmed Bandgap Reference ăHigh Current Totem Pole Output ăPb-Free Packages are Available*
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8 1
14 1
PDIP-8 N SUFFIX CASE 626
SOIC-14 D SUFFIX CASE 751A
PIN CONNECTIONS AND MARKING DIAGRAM
COMP VFB
Sense OSC
CS2841BEB AWL
YYWWG
PDIP-8
VREF VCC VOUT GND
14
CS2841BD14G AWL...
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