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MAX16821 Datasheet(PDF) 3 Page - Maxim Integrated Products |
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MAX16821 Datasheet(HTML) 3 Page - Maxim Integrated Products |
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3 / 24 page  (VCC = 5V, VDD = VCC, TA = TJ = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS OSCILLATOR Switching Frequency Range 125 1500 kHz Switching Frequency fSW RT = 500kΩ 120 125 130 kHz RT = 120kΩ 495 521 547 RT = 39.9kΩ 1515 1620 1725 Switching Frequency Accuracy 120kΩ < RT ≤ 500kΩ -5 +5 % 40kΩ ≤ RT ≤ 120kΩ -8 +8 CLKOUT Phase Shift with Respect to DH (Rising Edges) fSW = 125kHz, MODE connected to SGND 180 degrees CLKOUT Phase Shift with Respect to DL (Rising Edges) fSW = 125kHz, MODE connected to VCC 180 CLKOUT Output-Voltage Low VOL ISINK = 2mA 0.4 V CLKOUT Output-Voltage High VOH ISOURCE = 2mA 4.5 V SYNC Input High Pulse Width tSYNC 200 ns SYNC Input Clock High Threshold VSYNCH 2 V SYNC Input Clock Low Threshold VSYNCL 0.4 V SYNC Pullup Current ISYNC_ OUT VRT/SYNC = 0V 250 500 µA SYNC Power-Off Level VSYNC_ OFF 0.4 V INDUCTOR CURRENT LIMIT Average Current-Limit Threshold VCL CSP to CSN 26.4 27.5 33.0 mV Reverse Current-Limit Threshold VCLR CSP to CSN -2.0 mV Cycle-by-Cycle Current Limit CSP to CSN 60 mV Cycle-by-Cycle Overload VCSP to VCSN = 75mV 260 ns CURRENT-SENSE AMPLIFIER CSP to CSN Input Resistance RCS 4 kΩ Common-Mode Range VCMR(CS) VIN = 7V to 28V 0 5.5 V Input Offset Voltage VOS(CS) 0.1 mV Amplifier Voltage Gain AV(CS) 34.5 V/V 3dB Bandwidth f3dB 4 MHz CURRENT-ERROR AMPLIFIER (TRANSCONDUCTANCE AMPLIFIER) Transconductance gm 550 µS Open-Loop Gain AVL(CE) 50 dB MAX16821A/MAX16821B/ MAX16821C High-Power Synchronous HBLED Drivers with Rapid Current Pulsing www.maximintegrated.com Maxim Integrated │ 3 Electrical Characteristics (continued) |
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