STCS1A STMicroelectronics, STCS1A Datasheet
STCS1A
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STCS1A Summary of contents
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... Small appliances LED lighting ■ Car LED lights Description The STCS1A is a BiCMOS constant current source designed to provide a precise constant current starting from a varying input voltage source. The main target is to replace discrete components solution for driving LEDs in low voltage applications such giving benefits in terms of precision, integration and reliability ...
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Contents 1 Application diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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... IN IN OFF OFF OFF OFF C C BYP BYP 0.1µF 0.1µ PWM PWM STCS1A STCS1A DISC DISC SLOPE SLOPE GND GND C C Load disconnection Load disconnection SLOPE SLOPE (Open Drain output) (Open Drain output) 10nF 10nF DRAIN ...
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Pin configuration Figure 2. Pin connections (top view) DFN8 Table 2. Pin description Pin n° Symbol 1 V Supply voltage CC 2 PWM PWM dimming input 3 EN Shutdown pin 4 DRAIN Internal N-MOSFET drain Feedback input. The control ...
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Maximum ratings Table 3. Absolute maximum ratings Symbol V DC supply voltage CC DRAIN Drain pin PWM, EN, DISC Logic pins SLOPE, FB Configuration pins ESD Human body model (all pins) (1) T Junction temperature J T Storage temperature ...
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Electrical characteristics Table 5. Electrical characteristics ( µF; C DRAIN BYP Symbol Parameter V Supply voltage range CC Output current range I Output current O Regulation (percentage with respect to V =12V Feedback voltage ...
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Timing Figure 3. PWM and output current timing PWM PWM Current Current Figure 4. Block diagram High Voltage High Voltage Preregulator Preregulator 3.3 V 3.3 V Enable Enable EN EN Input ...
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Typical performance characteristics Figure DRAIN CC A Figure Temperature DRAIN Figure Temperature CC 8/19 = 25°C Figure 6. Figure 8. Figure 10 DRAIN ...
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Figure 11 rise fall SLOPE Figure 13. Dimming operation: Rise C = 1nF SLOPE Figure 12. Turn-on time C = floating SLOPE Figure 14. Dimming operation: Fall C = 1nF SLOPE 9/19 ...
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... Detail description The STCS1A is a BiCMOS constant current source designed to provide a precise constant current starting from a varying input voltage source. The main target is to replace discrete components solution for driving LEDs in low voltage applications such giving benefits in terms of precision, integration and reliability. ...
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... Diagnostic When STCS1A mode (EN is high), the device is able to detect disconnection or fail of the LED string monitoring V pulled low regardless the PWM pin status. This information can be used by the system to inform that some problem happens in the LEDs. pin lower than 75 mV the DISC pin is ...
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... IN IN 8.2 Thermal considerations The STCS1A is able to control a LED current up to 1.5 A and able to sustain a voltage on the drain pin Those operating conditions are however limited by thermal constraints, the thermal resistances shown in the in particular R depends on the copper area and the number of layers of the printed thJA circuit board under the pad ...
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LEDs current: 500 mA; – Package: DFN8 3x3 mm; – 50° this case V DRAIN P = (1.2 - 0. The junction temperature will be: T ...
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Package mechanical data In order to meet environmental requirements, ST offers these devices in ECOPACK packages. These packages have a lead-free second level interconnect. The category of second Level Interconnect is marked on the package and on the inner ...
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DFN8 (3x3 mm) mechanical data mm. Dim. Min. Typ. A 0.80 0.90 A1 0.02 A2 0.70 A3 0.20 b 0.18 0.23 D 3.00 D2 2.23 2.38 E 3.00 E2 1.49 1.64 e 0.50 L 0.30 0.40 mils. Max. Min. Typ. ...
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PowerSO-8 mechanical data Dim. Min 0.00 A2 1.25 b 0.31 c 0.17 D 4.80 D1 2.24 E 5.80 E1 3. 0.25 L 0.40 k 0° ccc 16/19 mm. Typ. Max. Min. 1.70 0.15 0.00 ...
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Tape & reel QFNxx/DFNxx (3x3) mechanical data mm. Dim. Min. Typ 12 3.3 Bo 3 Max. Min. 180 13.2 0.504 0.795 2.362 14 inch. Typ. Max. ...
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Revision history Table 6. Document revision history Date Revision 19-Feb-2008 1 02-Jul-2008 2 18/19 Changes Initial release. Modified: Table 5 on page 6. ...
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... Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. ...