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RL1632R-R150-F Datasheet(PDF) 4 Page - Allegro MicroSystems |
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RL1632R-R150-F Datasheet(HTML) 4 Page - Allegro MicroSystems |
4 / 17 page Constant-Current 3-Ampere PWM Dimmable Buck Regulator LED Driver A6211 4 Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com ELECTRICAL CHARACTERISTICS Valid at VIN = 24 V, for TA = –40°C to 105°C, typical values at TA = 25°C; unless otherwise noted Characteristics Symbol Test Conditions Min. Typ. Max. Unit Input Supply Voltage VIN TA = 25°C 6 – 48 V VIN Undervoltage Lockout Threshold VUVLO VIN increasing – 5.3 – V VIN Undervoltage Lockout Hysteresis VUVLO_HYS VIN decreasing – 150 – mV VIN Pin Supply Current IIN VCS = 0.5 V, EN = high – 5 – mA VIN Pin Shutdown Current IINSD EN shorted to GND – 1 10 μA BOOT Switch Current Limit Threshold ISWLIM 3.0 4.0 5.0 A Buck Switch On-Resistance R DS(on) VBOOT = VIN + 4.3 V, TA = 25°C, ISW = 1 A – 0.25 0.4 Ω BOOT Undervoltage Lockout Threshold VBOOTUV VBOOT to VSW increasing 1.7 2.9 4.3 V BOOT Undervoltage Lockout Hysteresis VBOTUVHYS VBOOT to VSW decreasing – 370 – mV Switching Minimum Off-Time tOFFmin VCS = 0 V – 110 150 ns Switching Minimum On-TIme tONmin – 110 150 ns Selected On-Time tON VIN = 24 V, VOUT = 12 V, RON = 137 kΩ 800 1000 1200 ns Regulation Comparator and Error Amplifier Load Current Sense Regulation Threshold VCSREG VCS decreasing, SW turns on 187.5 200 210 mV Load Current Sense Bias Current ICSBIAS VCS = 0.2 V, EN = low – 0.9 – μA Internal Linear Regulator VCC Regulated Output VCC 0 mA < ICC < 5 mA, VIN > 6 V 5.0 5.3 5.6 V VCC Current Limit* ICCLIM VIN = 24 V, VCC = 0 V 5 20 – mA Enable Input Logic High Voltage VIH VEN increasing 1.8 – – V Logic Low Voltage VIL VEN decreasing – – 0.4 V EN Pin Pull-down Resistance RENPD VEN = 5 V – 100 – kΩ Maximum PWM Dimming Off-Time tPWML Measured while EN = low, during dimming control, and internal references are powered-on (exceeding tPWML results in shutdown) 10 17 – ms Thermal Shutdown Thermal Shutdown Threshold TSD – 165 – °C Thermal Shutdown Hysteresis TSDHYS –25–°C *The internal linear regulator is not designed to drive an external load |
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