STCS2A STMicroelectronics, STCS2A Datasheet
STCS2A
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STCS2A Summary of contents
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... Low voltage lighting ■ Small appliances LED lighting ■ Car LED lights Description The STCS2A 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 Table 1. Device summary ...
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Contents 1 Application diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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... Load disconnection Load disconnection (Open Drain output) (Open Drain output) 100 ohm 100 ohm C C BYP BYP V V 0.1µF 0.1µ PWM PWM STCS2A STCS2A GND GND SLOPE SLOPE DISC DISC C C SLOPE SLOPE 10nF 10nF DRAIN DRAIN C C ...
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Pin configuration Figure 2. Pin connections (top view) Table 2. Pin description Pin n° Symbol 1 V Supply voltage CC 2 PWM PWM dimming input 3 EN Shutdown connect 5 DRAIN Internal N-MOSFET drain Internal N-MOSFET ...
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Maximum ratings Table 3. Absolute maximum ratings Symbol V DC supply voltage CC DRAIN Drain pin SOURCE Source pin PWM, EN, DISC Logic pins SLOPE, FB Configuration pins ESD Human body model (all pins) (1) T Junction temperature J ...
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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 ...
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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 8/18 = 25°C Figure 6. 1000 1000 100 100 0.1 ...
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Figure 11 rise fall SLOPE Figure 13. Dimming operation: Rise SLOPE Figure 12. Turn-on time Figure 14. Dimming operation: Fall SLOPE 9/18 ...
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... Detail description The STCS2A 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 STCS2A 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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... Thermal considerations The STCS2A is able to control a LED current and able to sustain a voltage on the drain pin Those operating conditions are however limited by thermal constraints. The poor thermal conduction of epoxy FR4 boards does not permit to benefit of the outstanding thermal performance of the PowerSO-10. ...
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DRAIN FB basing on this and on the thermal resistance and ambient temperature, the junction temperature can be calculated as thJA D A typical application could ...
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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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PowerSO-10 Mechanical Data mm. Dim. Min. Typ 3.40 A3 1.25 b 0.40 c 0.35 D 9.40 D1 7.40 E 13.80 E1 9.30 E2 7.20 E3 5.90 e 1.27 L 0.95 0° inch. Max. Min. Typ. 3.70 0.10 ...
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Tape & Reel PowerSO-10 Mechanical Data Dim. Min 12 14.9 Bo 9.9 Ko 4.15 Po 3.9 P 23.9 W 23.7 16/18 mm. Typ. Max. Min. 330 13.2 0.504 0.795 2.362 30.4 15.1 ...
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Revision history Table 6. Document revision history Date Revision 19-Feb-2008 1 28-May-2008 2 02-Jul-2008 3 Changes Initial release. Modified: Table 3 on page 5. Modified: Table 5 on page 6. 17/18 ...
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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. ...