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| CL7 Linear, 100mA, Constant Current LED Driver with Enable Features 100mA 5% constant current drive Built-in reverse polarity protection Logic level enable Dimmable via EN pin Overtemperature protection 90V max rating for transient immunity General Description The CL7 is a linear fixed current regulator designed for driving high brightness LEDs at 100mA from nominal 12V, 24V, and 48V power supplies. With a maximum rating of 90V, it is able to withstand transients without the need for additional transient protection circuitry. The CL7 is offered in the Power SO-8 package. An active low enable input (EN) allows logic level control of the LED for on/off control or PWM dimming. The enable input has 100k pull-down resistance. For applications not needing an enable input, refer to the CL6 data sheet. Overtemperature protection shuts off the LED current when the die temperature rises above 135C (nominal). Full LED current resumes when the die temperature falls below 105C (nominal). Applications Flashlights Specialty lighting Low voltage signage Low voltage lighting This device is not rated for automotive applications! Typical Application Circuit VIN 100mA VDD Host Controller EN OUT Control 100k CL7 GND CL7 Ordering Information Device CL7 -G indicates package is RoHS compliant (`Green') 8-Lead Power SOIC CL7SG-G Absolute Maximum Ratings Supply voltage, VDD Output voltage, VOUT Enable voltage, VEN Operating junction temperature Storage temperature -25V to +100V -25V to +100V -0.5V to +6.5V -40C1 -65C to +150C Pin Configurations Power SO-8 GND GND GND GND VDD OUT NC EN Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied. Continuous operation of the device at the absolute rating level may affect device reliability. All voltages are referenced to device ground. 1. Maximum junction temperature internally limited. Underside plate is GND IOUT vs Temperature IOUT (Normalized) 1.05 1.00 0.95 Pin Designation Pin VDD OUT GND Name VDD Output Ground Enable Description Supply voltage for the CL7 Connect the LED between this pin and the supply voltage Circuit common Active low enable input - this input has an internal 100k pull-down resistance 0.90 EN 0.85 -50 -25 0 25 50 75 O 100 125 Temperature ( C) Thermal Characteristics (Guaranteed by design - not production tested ) Symbol j-a TLIM THYS Parameter Thermal resistance, junction to ambient Overtemperature limit Overtemperature hysteresis Power SO-8 Min 120 Typ 67 135 30 Max 150 Units O Conditions C/W Soldered to 2cm2 exposed copper area O O C C ----- Recommended Operating Conditions (all voltages with respect to GND pin) Symbol VDD VOUT TJ Parameter Supply voltage Voltage at OUT pin1 Junction temperature2 Normal Extended Normal Extended Min 6.5 6.5 4.0 4.0 -40 Typ Max 28 90 28 90 119 Units V V o Conditions ------- C 1. Continuous operation at high VOUT voltages may result in activation of overtemperature protection. Use appropriate heatsinking. 2. Maximum junction temperature internally limited. 2 CL7 Electrical Characteristics (Over normal recommended operating conditions unless otherwise specified. All voltages with respect to GND pin. Production tested @ 25OC.) Symbol IDD IOUT IOUT(OFF) VEN(ON) VEN(OFF) REN VOFF tON tOFF tRISE tFALL Parameter Current into VDD pin Current into OUT pin1 Current into OUT pin with VDD pin open or EN=1 Enable voltage, on Enable voltage, off Enable pull-down resistance Voltage at VDD to shut off LED current On delay, EN to OUT Off delay, EN to OUT Current rise time, EN to OUT Current fall time, EN to OUT Min 3.0 95 90 50 2.4 - Typ 5.0 100 100 100 3.0 0.1 4.0 0.3 Max 10 105 110 120 10 0.8 1 - Units mA mA A V V k V s s s s Conditions --Normal conditions, 25C Normal conditions, full temp2 Extended conditions VDD = open ------IOUT < 10A EN = 0V EN = 5V EN = 0V EN = 5V Timing EN t ON t RISE 90% t OFF t FALL IOUT 10% Application Circuits PWM Dimming VIN (1-D) * 100mA EN = 0: 107.5mA EN = 1: 7.5mA 2-Level LED Circuit VIN VDD PWM signal EN Control 100k OUT EN VDD Control 100k OUT CL7 GND CL7 GND D is the portion of time the PWM signal is high. Minimum VIN is increased by LED drop. 3 CL7 8-Lead SOIC (Narrow Body w/Heat Slug) Package Outline (SG) 4.90x3.90mm body, 1.70mm height (max), 1.27mm pitch D 8 D1 8 Exposed Thermal Pad Zone 1 Note 1 (Index Area D/2 x E1/2) E1 E E2 L2 Gauge Plane 1 1 L1 L Seating Plane Top View A Bottom View View B View B h h A A2 e Seating Plane Note 1 A1 b A Side View View A-A Note 1: This chamfer feature is optional. If it is not present, then a Pin 1 identifier must be located in the index area indicated.The Pin 1 identifier may be either a mold, or an embedded metal or marked feature. Symbol MIN Dimension NOM (mm) MAX A 1.25 1.70 A1 0.00 0.15 A2 1.25 1.70 b 0.31 0.51 D 4.80 4.90 5.00 D1 3.30* 3.81* E 5.80 6.00 6.20 E1 3.80 3.90 4.00 E2 2.29* 2.79* e 1.27 BSC h 0.25 0.50 L 0.40 1.27 L1 L2 0 O 1 5O 15O 1.04 0.25 REF BSC 8 O JEDEC Registration MS-012, Variation BA, Issue E, Sept. 2005. Dimensions marked with (*) are non-JEDEC dimensions. Drawings not to scale. (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to http://www.supertex.com/packaging.html.) Doc.# DSFP-CL7 NR021407 4 |
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