sp7120-led-driver Exar Corporation, sp7120-led-driver Datasheet
sp7120-led-driver
Related parts for sp7120-led-driver
sp7120-led-driver Summary of contents
Page 1
... LED power dissipation by having the cathodes heat-sinked to the ground plane of the circuit board. The SP7120 may drive two LEDs or one LED at twice the current with two channels connected in parallel. The SP7122 can drive three LEDs or one LED at three times the current ...
Page 2
... Vcc V 0 0.8 V μ kHz μ LED current drops 10% from nominal value SP7120/22 Low Dropout LED Driver 2 page ABSOLUTE MAXIMUM RATINGS , V , and EN to GND -0. LED2 ….…190°C/W JA ELECTRICAL CHARACTERISTICS Conditions EN = LOW Vcc = 5.5V 20mA LED Vcc = 5.5V 15mA LED 300mV< ...
Page 3
... Enable pin. Device is active logic HIGH No Connect should be left floating 4 Connect anode of LED3 5 Connect anode of LED2 6 Connect anode of LED1 SP7120/22 Low Dropout LED Driver 3 page PIN ASSIGNMENTS as possible IN Ground pin BLOCK DIAGRAM © 2007 Sipex Corporation ...
Page 4
... SP7122B 20mA SP7122C 25mA The SP712X drivers are regulated current sources with an enable input. The SP7120 and SP7122 have factory preset LED current at three programmed levels: 15mA, 20mA or 25mA (versions A, B, and C respectively). The SP712X circuit consists of enable, bandgap reference, and current amplifier circuit blocks ...
Page 5
... Powering 1 high power LED I Powering 1 high power LED I Jan 7 ‘08 RevE channels 75mA with C version OUT up to 50mA with C version OUT C1 1nF SP7122 Powering 3 LED’s SP7120/22 Low Dropout LED Driver 5 page APPLICATION CIRCUITS © 2007 Sipex Corporation ...
Page 6
... The quiescent current is part of the total output current I is for 2 Channels 15mA per channel OUT Jan 7 ‘08 RevE C1 1nF SP7120 Powering 2 LEDs BOARD LAYOUT AND GROUNDING TYPICAL PERFORMANCE SP7120A I is for 2 Channels 15mA per channel OUT SP7120/22 Low Dropout LED Driver 6 page © 2007 Sipex Corporation ...
Page 7
... Channels 15mA per channel OUT Jan 7 ‘08 RevE I is for 2 Channels 15mA per channel OUT TYPICAL PERFORMANCE SP7120A I is for 2 Channels 15mA per channel OUT I is for 2 Channels 15mA per channel OUT SP7120/22 Low Dropout LED Driver 7 page © 2007 Sipex Corporation ...
Page 8
... I is for 2 Channels 15mA per channel OUT Jan 7 ‘08 RevE I is for 2 Channels 15mA per channel OUT TYPICAL PERFORMANCE SP7120A SP7120/22 Low Dropout LED Driver 8 page © 2007 Sipex Corporation ...
Page 9
... PWM Minimum duty cycle 15μS 20kHz CH1: PWM Signal CH2 Anode of LED CH4: LED current 10mA/div Jan 7 ‘08 RevE PWM Low duty cycle 15μS 5kHz CH1: PWM Signal CH2: Anode of LED SP7120/22 Low Dropout LED Driver 9 page CH4: LED current 10mA/div © 2007 Sipex Corporation ...
Page 10
... OUT Jan 7 ‘08 RevE TYPICAL PERFORMANCE SP7120A CH1: PWM Signal CH2: Anode of LED TYPICAL PERFORMANCE SP7122A I is for 3 Channels 15mA per channel OUT SP7120/22 Low Dropout LED Driver 10 page PWM 50% Duty Cycle 5kHz CH4: LED current 10mA/div © 2007 Sipex Corporation ...
Page 11
... Channels 15mA per channel OUT Jan 7 ‘08 RevE TYPICAL PERFORMANCE SP7122A I is for 3 Channels 15mA per channel OUT I is for 3 Channels 15mA per channel OUT I is for 3 Channels 15mA per channel OUT SP7120/22 Low Dropout LED Driver 11 page © 2007 Sipex Corporation ...
Page 12
... Channels 15mA per channel OUT CH:1 PWM Signal CH2: Anode of LED CH4: LED current 10mA/div High Duty Cycle 20kHz CH1: PWM Signal CH2: Anode of LED CH4: LED current 10mA/div SP7120/22 Low Dropout LED Driver 12 page Low duty cycle 5Khz © 2007 Sipex Corporation ...
Page 13
... PWM Low Duty Cycle Single LED 5kHz CH1: PWM Signal CH2 Anode of LED CH4: LED current 20mA/div PWM 50% Single LED 20kHz CH1: PWM Signal CH2 Anode of LED CH4: LED current 20mA/div SP7120/22 Low Dropout LED Driver 13 page © 2007 Sipex Corporation ...
Page 14
... OUT Jan 7 ‘08 RevE TYPICAL PERFORMANCE SP7122B I is for 3 channels 20mA per channel OUT I is for 3 channels 20mA per channel OUT I is for 3 channels 20mA per channel OUT SP7120/22 Low Dropout LED Driver 14 page © 2007 Sipex Corporation ...
Page 15
... OUT PWM High Duty Cycle 20kHz CH1: PWM Signal CH2: Anode of LED PWM 50%Duty Cycle 5kHz CH1: PWM Signal CH2 Anode of LED CH4: LED current 10mA/div SP7120/22 Low Dropout LED Driver 15 page CH4: LED current 10mA/div © 2007 Sipex Corporation ...
Page 16
... PWM 50% Duty Cycle Single LED 5kHz CH1: PWM Signal CH2 Anode of LED CH4: LED current 50mA/div PWM Minimum Duty Cycle 15uS Single LED 20kHz CH1: PWM Signal CH2 Anode of LED CH4: LED current 50mA/div SP7120/22 Low Dropout LED Driver 16 page © 2007 Sipex Corporation ...
Page 17
... Jan 7 ‘08 RevE SP7120/22 Low Dropout LED Driver 17 page PACKAGE: 6 PIN SOT23 © 2007 Sipex Corporation ...
Page 18
... Sipexsupport@sipex.com http://www.sipex.com/content.aspx?p=support http://www.sipex.com/applicationNotes.aspx Sipex Corporation Headquarters and Sales Office 233 South Hillview Drive Milpitas, CA95035 tel: (408) 934-7500 TM FAX: (408) 935-7600 SP7120/22 Low Dropout LED Driver 18 page ORDERING INFORMATION Moisture Ө Sensitivity Channels (˚C/W) Level 190 L1 @ 260º ...