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CS2841BED14 датащи(PDF) 1 Page - Cherry Semiconductor Corporation |
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CS2841BED14 датащи(HTML) 1 Page - Cherry Semiconductor Corporation |
1 / 6 page 1 1 COMP 2 3 4 VFB Sense OSC VREF VCC VOUT Gnd 8 7 6 5 VCC Gnd OSC VFB COMP Sense VREF VOUT Output Enable 5V Reference Internal Bias NOR S R PWM Latch Current Sensing Comparator Oscillator 1 V R 2 R VC Error Amplifier + – 8.0V/7.4V 2.50V Set/ Reset Undervoltage Lock-out Circuit VCC Pwr Pwr Gnd s Optimized for Off-line Control s Internally Trimmed Temperature Compensated Oscillator s Maximum Duty-cycle Clamp s VREF Stabilized before Output Stage Enabled s Low Start-up Current s Pulse-by-pulse Current Limiting s Improved Undervoltage Lockout s Double Pulse Suppression s 1% Trimmed Bandgap Reference s High Current Totem Pole Output Package Options 8 Lead PDIP 10 7 14 13 12 8 1 2 3 4 5 6 11 9 COMP NC VFB NC Sense NC OSC VREF NC VCC VCC Pwr VOUT Pwr Gnd Gnd 14 Lead SO Narrow Automotive Current Mode PWM Control Circuit CS2841B Description The CS2841B provides all the nec- essary features to implement off- line fixed frequency current-mode control with a minimum number of external components. The CS2841B (a variation of the CS-2843A) is designed specifically for use in automotive operation. The low start threshold voltage of 8.0V (typ), and the ability to sur- vive 40V automotive load dump transients are important for auto- motive subsystem designs. The CS-2841 series has a history of quality and reliability in automo- tive applications. The CS2841B incorporates a preci- sion temperature-controlled oscil- lator with an internally trimmed discharge current to minimize vari- ations 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 under- voltage lockout. Block Diagram Absolute Maximum Ratings Supply Voltage (Low Impedance Source)...................................................40V Output Current ...............................................................................................±1A Output Energy (Capacitive Load) .................................................................5µJ Analog Inputs (VFB, Sense) ............................................................-0.3V to 5.5V Error Amp Output Sink Current...............................................................10mA Lead Temperature Soldering Wave Solder (through hole styles only) ..........10 sec. max, 260°C peak Reflow (SMD styles only) ...........60 sec. max above 183°C, 230°C peak Features Rev. 6/23/99 Cherry Semiconductor Corporation 2000 South County Trail, East Greenwich, RI 02818 Tel: (401)885-3600 Fax: (401)885-5786 Email: info@cherry-semi.com Web Site: www.cherry-semi.com A Company ® |
Аналогичный номер детали - CS2841BED14 |
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Аналогичное описание - CS2841BED14 |
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