Supertex inc. CL7. Linear, 100mA, Constant Current LED Driver with Enable Input CL7. Features. General Description. Applications
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1 Linear, 100mA, Constant Current LED Driver with Enable Input Features 100mA ±5% constant current drive Built-in reverse polarity protection Logic level enable Dimmable via pin Overtemperature protection 90V max rating for transient immunity Applications Flashlights Specialty lighting Low voltage signage Low voltage lighting General Description The 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 is offered in the 8-Lead SOIC package. An active low enable input () allows logic level control of the LED for on/off control or PWM dimming. The enable input has 100kΩ pull-down resistance. For applications not needing an enable input, refer to the CL6 data sheet. Over temperature protection shuts off the LED current when the die temperature rises above 135 C (nominal). Full LED current resumes when the die temperature falls below 105 C (nominal). Typical Application Circuit V IN 100mA Host Controller 100kΩ Control Doc.# DSFP-
2 Ordering Information Pin Configuration Part Number Package Options Packing SG-G 8-Lead SOIC (w/heat slug) 2500/Reel -G denotes a lead (Pb)-free / RoHS compliant package NC Absolute Maximum Ratings Parameter Value Supply voltage, V DD -25V to +100V Output voltage, V -25V to +100V Enable voltage, V Operating junction temperature Storage temperature -0.5V to +6.5V -40 C* -65 C to +150 C 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. Note: * Maximum junction temperature internally limited. Typical Thermal Resistance Package 8-Lead SOIC (w/heat slug) * Mounted on JEDEC test PCB (2s 2p) θ ja 84 O C/W* Product Marking YYWW LLLL Pin Designation 4 Heat Slug YY = Year Sealed WW = Week Sealed L = Lot Number = Green Packaging Package may or may not include the following marks: Si or 8-Lead SOIC w/heat sug Pin Name Description Supply voltage for the Output Connect the LED between this pin and the supply voltage 5 8-Lead SOIC w/heat slug (top view) (Heat slug potential is at ground) Ground Circuit common Enable Active low enable input - this input has an internal 100kΩ pull-down resistance Recommended Operating Conditions (all voltages with respect to pin) Sym Parameter Min Typ Max Units Conditions V DD Supply voltage Normal Extended V --- V Voltage at pin (1) Normal Extended V --- T J Junction temperature (2) o C --- Note: 1. Continuous operation at high V voltages may result in activation of over temperature protection. Use appropriate heat sinking. 2. Maximum junction temperature internally limited. Thermal Characteristics (Guaranteed by design not production tested ) Sym Parameter Min Typ Max Units Conditions T LIM Over-temperature limit O C --- T HYS Over-temperature hysteresis O C --- Doc.# DSFP- 2
3 Electrical Characteristics (Over normal recommended operating conditions unless otherwise specified. All voltages with respect to pin. Production 25 O C.) Sym Parameter Min Typ Max Units Conditions I DD Current into pin ma --- I Current into pin Current into pin with pin open or = 1 I (OFF) ma µa V DD = open V (ON) Enable voltage, on V --- V (OFF) Enable voltage, off V --- R Enable pull-down resistance kω --- V OFF Voltage at to shut off LED current V I < 10µA t ON On delay, to µs = 0V t OFF Off delay, to µs = 5V t RISE Current rise time, to µs = 0V t FALL Current fall time, to µs = 5V Normal conditions, 25 C Normal conditions, full temp 2 Extended conditions Note: 1. Continuous operation at high V voltages may result in activation of over temperature protection. Use appropriate heat sinking. 2. Maximum junction temperature internally limited. Timing t ON t OFF t RISE t FALL I 90% 10% I vs Temperature 1.05 I (normalized) Temperature ( O C) Doc.# DSFP- 3
4 Application Circuits PWM Dimming 2-Level LED Circuit V IN (1-D) 100mA = 0: = 1: 107.5mA 7.5mA V IN PWM signal 100kΩ Control Control 100kΩ D is the portion of time the PWM signal is high. Minimum V IN is increased by LED drop. Doc.# DSFP- 4
5 8-Lead SOIC (Narrow Body w/heat Slug) Package Outline (SG) 4.90x3.90mm body, 1.70mm height (max), 1.27mm pitch D D1 8 8 Note 1 (Index Area D/2 x E1/2) E1 E Exposed Thermal Pad Zone E2 1 1 Top View Bottom View θ1 A A2 A1 e b A Seating Plane Side View A Note 1 h View B h L L1 θ L2 Gauge Plane Seating Plane View A-A View B Notes: 1. If optional chamfer feature is not present, a Pin 1 identifier must be located in the index area indicated. The Pin 1 identifier can be: a molded mark/ identifier; an embedded metal marker; or a printed indicator. Symbol A A1 A2 b D D1 E E1 E2 e h L L1 L2 θ θ1 1.25* * * 3.80* O 5 O MIN Dimension NOM (mm) BSC REF BSC - - MAX * * * 4.00* O 15 O JEDEC Registration MS-012, Variation BA, Issue E, Sept * This dimension is not specified in the JEDEC drawing. This dimension differs from the JEDEC drawing. Drawings not to scale. Supertex Doc. #: DSPD-8SOSG, Version D (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to does not recommend the use of its products in life support applications, and will not knowingly sell them for use in such applications unless it receives an adequate product liability indemnification insurance agreement. does not assume responsibility for use of devices described, and limits its liability to the replacement of the devices determined defective due to workmanship. No responsibility is assumed for possible omissions and inaccuracies. Circuitry and specifications are subject to change without notice. For the latest product specifications refer to the (website: http//) 2014 All rights reserved. Unauthorized use or reproduction is prohibited. Doc.# DSFP Bordeaux Drive, Sunnyvale, CA Tel:
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