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ADD5203ACPZ-RL Datasheet(PDF) 4 Page - Analog Devices |
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ADD5203ACPZ-RL Datasheet(HTML) 4 Page - Analog Devices |
4 / 24 page ADD5203 Rev. 0 | Page 4 of 24 SPECIFICATIONS STEP-UP SWITCHING REGULATOR SPECIFICATIONS VIN = 12 V, SHDN = high, TA = −25°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C. Table 1. Parameter Symbol Test Conditions Min Typ Max Unit SUPPLY Input Voltage Range VIN 6 21 V BOOST OUTPUT Output Voltage VOUT 45 V SWITCH On Resistance RDS(ON) VIN = 12 V, ISW = 100 mA 150 210 mΩ Leakage Current ILKG 44 70 μA Peak Current Limit ICL Duty cycle (D) = DMAX 2.9 A OSCILLATOR Switching Frequency fSW RF = 150 kΩ 800 1000 1200 kHz fSW RF = 470 kΩ 350 kHz Maximum Duty Cycle DMAX RF = 470 kΩ 85 92 % SOFT START Soft Start Time tSS 1.5 ms OVERVOLTAGE PROTECTION Overvoltage Rising Threshold on OVP Pin VOVPR 1.154 1.20 1.267 V Overvoltage Falling Threshold on OVP Pin VOVPF 1.050 1.12 1.188 V LED CURRENT REGULATION SPECIFICATIONS VIN = 12 V, SHDN = high, TA = −25°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C. Table 2. Parameter Symbol Test Conditions Min Typ Max Unit CURRENT SOURCE ISET Pin Voltage VSET 6 V ≤ VIN ≤ 21 V 1.16 1.2 1.24 V Adjustable LED Current1 ILED 0 30 mA Constant Current Sink of 20 mA2 ILED20 RSET = 141.56 kΩ 19.4 20 20.6 mA Minimum Headroom Voltage2 VHR20 RSET = 141.56 kΩ 0.65 0.85 V Current Matching Between Strings2 RSET = 141.56 kΩ −1.5 +1.5 % LED Current Accuracy2 RSET = 141.56 kΩ −3 +3 % Current Source Leakage Current 1 μA FPWM GENERATOR Dimming Frequency Range 6 V ≤ VIN ≤ 21 V 200 10,000 Hz Dimming Frequency fPWM RFPWM = 50 kΩ, CFPWM = 150 pF 820 1000 1180 Hz LED FAULT DETECTION Open Fault Delay1 TD_OPENFAULT 6.5 μs 1 These electrical specifications are guaranteed by design. 2 Tested at TA = +25°C. |
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