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LM3538 데이터시트(PDF) 3 Page - Texas Instruments |
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LM3538 데이터시트(HTML) 3 Page - Texas Instruments |
3 / 31 page LM3538 www.ti.com SNVS674A – JUNE 2011 – REVISED MAY 2013 PIN DESCRIPTIONS Bump Name Description C5 VIN_A Input voltage for LED driver and sensor interface. Input range: 2.7V to 5.5V. E5 VIN_B Input voltage for the regulators. This must be connected to the same voltage supply as VIN_A F5 VIN_C Input voltage (power rail) for the LDO regulators. 1.8V ≤ VIN_C ≤ VIN_A B1 SCL Serial interface clock B3 SDA Serial interface data A1 HWEN Hardware enable pin. High = normal operation, low = RESET B2 PWM External PWM Input - Allows the current sinks to be turned on and off at a frequency and duty cycle externally controlled. Minimum on-time pulse width = 15µsec. E4 SBIAS Power supply for a light sensor. Leave unconnected if not used. E3 GPO1 General purpose output. Can be used as a sensor gain control signal. When functioning as a general purpose output, it is open drain and requires an external pullup. Leave unconnected if not used. E2 GPO2 General purpose output. Can be used as a sensor gain control signal. When functioning as a general purpose output, it is open drain and requires an external pullup. Leave unconnected if not used. D5 ALS Ambient Light Sensor input. Connect to ground if not used. F3 GND Regulator ground A2 PGND LED driver and charge pump ground F2 LDO4 Programmable VOUT of 1.2-3.3 V. Max load = 150mA. F4 LDO3 Programmable VOUT of 1.2-3.3 V. Max load = 150mA. E1 LDO2 Programmable VOUT of 1.2-3.3 V. Max load = 150mA. F1 LDO1 Programmable VOUT of 1.2-3.3 V. Max load = 300mA. C3 NC Not Connected, keep floating. C4 INT ALS interrupt. A pullup resistor is required. A '0’ means a change has occurred, while a ‘1’ means no ALS adjustment has been made. D4 D6 LED driver D3 D5 LED driver D2 D4 LED driver D1 D3 LED driver C1 D2 LED driver C2 D1 LED driver B5 VOUT Charge pump output B4 C2- Flying capacitor 2 negative terminal A4 C2+ Flying capacitor 2 positive terminal A3 C1- Flying capacitor 1 negative terminal A5 C1+ Flying capacitor 1 positive terminal These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. Copyright © 2011–2013, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Links: LM3538 |
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