CL7 Linear, 100mA, Constant Current LED Driver with Enable Features ► ► ► ► ► ► 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. 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 Applications ► ► ► ► ► Flashlights Specialty lighting Low voltage signage Low voltage lighting This device is not rated for automotive applications! An active low enable input (EN) 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. Overtemperature 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 VIN 100mA VDD Host Controller EN OUT Control 100kΩ CL7 GND CL7 Ordering Information Device 8-Lead Power SOIC CL7 CL7SG-G -G indicates package is RoHS compliant (‘Green’) Pin Configurations Absolute Maximum Ratings Supply voltage, VDD -25V to +100V Output voltage, VOUT -25V to +100V Enable voltage, VEN -0.5V to +6.5V GND VDD -40°C1 GND OUT -65°C to +150°C GND NC GND EN Operating junction temperature Storage temperature Power SO-8 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. Underside plate is GND 1. Maximum junction temperature internally limited. Pin Designation IOUT (Normalized) IOUT vs Temperature 1.05 1.00 Pin Name Description VDD VDD Supply voltage for the CL7 OUT Output Connect the LED between this pin and the supply voltage GND Ground Circuit common EN Enable Active low enable input - this input has an internal 100kΩ pull-down resistance 0.95 0.90 0.85 -50 -25 0 25 50 75 100 125 Temperature ( C) O Thermal Characteristics (Guaranteed by design – not production tested ) Symbol Parameter θj-a Thermal resistance, junction to ambient TLIM Overtemperature limit THYS Overtemperature hysteresis Power SO-8 Min Typ Max Units Conditions - 67 - 120 135 150 O --- - 30 - O --- O C/W Soldered to 2cm2 exposed copper area C C Recommended Operating Conditions (all voltages with respect to GND pin) Symbol Parameter Min Typ Max Units Conditions VDD Supply voltage Normal Extended 6.5 6.5 - 28 90 V --- VOUT Voltage at OUT pin1 Normal Extended 4.0 4.0 - 28 90 V --- -40 - 119 TJ Junction temperature2 o 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 Parameter Min Typ Max Units Conditions IDD Current into VDD pin 3.0 5.0 10 mA --- IOUT Current into OUT pin1 95 90 50 100 100 - 105 110 120 mA Normal conditions, 25°C Normal conditions, full temp2 Extended conditions IOUT(OFF) Current into OUT pin with VDD pin open or EN=1 - - 10 µA VDD = open VEN(ON) Enable voltage, on - - 0.8 V --- VEN(OFF) Enable voltage, off 2.4 - - V --- REN Enable pull-down resistance - 100 - kΩ --- VOFF Voltage at VDD to shut off LED current - - 1 V IOUT < 10µA tON On delay, EN to OUT - 3.0 - µs EN = 0V tOFF Off delay, EN to OUT - 0.1 - µs EN = 5V tRISE Current rise time, EN to OUT - 4.0 - µs EN = 0V tFALL Current fall time, EN to OUT - 0.3 - µs EN = 5V Timing EN t ON t OFF t FALL t RISE 90% IOUT 10% Application Circuits PWM Dimming 2-Level LED Circuit VIN VIN EN = 0: 107.5mA EN = 1: 7.5mA (1-D) • 100mA VDD PWM signal EN OUT VDD Control EN OUT Control 100kΩ 100kΩ CL7 CL7 GND GND Minimum VIN is increased by LED drop. D is the portion of time the PWM signal is high. 3 CL7 8-Lead SOIC (Narrow Body w/Heat Slug) Package Outline (SG) 4.90x3.90mm body, 1.70mm height (max), 1.27mm pitch D1 D θ1 8 8 Exposed Thermal Pad Zone E E1 Note 1 (Index Area D/2 x E1/2) E2 L 1 1 L2 Gauge Plane θ Seating Plane L1 Top View View B Bottom View A View B h h A A2 A1 Note 1 Seating Plane e 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 A1 0.00 A2 1.25 b 0.31 D 4.80 D1 3.30* E 5.80 E1 3.80 E2 e 2.29* - - - - 4.90 - 6.00 3.90 - 1.70 0.15 1.70 0.51 5.00 3.81* 6.20 4.00 2.79* h 0.25 1.27 BSC L L1 L2 0.40 - - 0.50 1.27 θ 0 1.04 0.25 REF BSC O θ1 5O - - 8O 15O 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