STLDC08PUR STMicroelectronics, STLDC08PUR Datasheet
STLDC08PUR
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STLDC08PUR Summary of contents
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... The IC integrates an FET driver for a precise PWM dimming. STLDC08 comes in a DFN10 ( mm) package. Table 1. Device summary Order code STLDC08PUR February 2011 Step-up controller for LED supply DFN10 ( mm) Marking STLDC08 Doc ID 18476 Rev 1 ...
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Contents Contents 1 Application diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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STLDC08 12 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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... Electric schematic optimized for 2 LEDs and I RF BATTERY EN/PWM AM07845v1 Table 2. List of components Reference Manufacturer C1 Murata C2 Murata C4 Murata C3, C5, C6 Murata L Coilcraft M1,M2 STMicroelectronics D1 STMicroelectronics Rfb VCC DRV 6 EN/PWM SENSE 1 VOUT 2VCC 2 PWMOUT GND EXP 8 11 Part number GRM21BR60J475 GRM31CB31C106K GRM188R70J103KA01B ...
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... Electric schematic optimized for 4 LEDs and I RF BATTERY VCC 7 EN/PWM EN/PWM 3 2VCC Table 3. List of components Part reference Manufacturer C1 Murata C2 Murata C4 Murata C3, C5, C6 Murata M1,M2 STMicroelectronics D1 STMicroelectronics L Coilcraft Rfb Rs RF LED DRV 6 SENSE 1 VOUT 2 PWMOUT 5 FB GND EXP 11 8 Part number GRM21BR60J106KE19 GRM31CR61C226K GRM188R70J103KA01B GRM188R61C105K STS5DNF20V STPS2L30 DO3316P-223_L ...
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Absolute maximum ratings 2 Absolute maximum ratings Table 4. Absolute maximum ratings Symbol V Supply voltage CC EN/PWM Analog input FB Analog input SENSE Analog input 2V Analog outputs CC V5 Analog outputs DRV, PWMOUT Analog outputs V Output voltage ...
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STLDC08 3 Pin configuration Figure 3. Pin connections (top through view) Bottom view Table 6. Pin description Pin # Pin name 1 VOUT Over voltage protection and supply pin for the IC when V Driver of the external MOSFET for ...
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Electrical characteristics 4 Electrical characteristics T = - µ otherwise specified. Table 7. Electrical characteristics Symbol Parameter General section V Supply voltage range CC Supply current measured on V pin ...
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STLDC08 Table 7. Electrical characteristics (continued) Symbol Parameter SENSE Maximum current sense V SENSE MAX threshold I Bias current SENSE EN/PWM section V Low level threshold IL V Low level threshold IL V High level threshold IH V High level ...
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Typical performance characteristics 5 Typical performance characteristics Figure 4. V vs. temperature FB Figure 6. I vs. temperature FB = 0.5 V OUT Figure 8. Efficiency vs. input voltage 2 LEDs Figure 9. 10/29 Figure 5. Maximum V Figure 7. ...
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STLDC08 Figure 10. Startup timing and dimming I vs. time, 2 LEDs 200 mA 2LEDs CC LED Figure 12. Startup timing and dimming I vs. time, 4 LEDs ...
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Block diagram 6 Block diagram Figure 16. Block diagram Over Voltage Over Voltage Protection Protection + TOFF timer TOFF timer T T OFF OFF GND GND GND GND = 20 µsec = 20 µsec T T ONMAX ...
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STLDC08 7 Detailed description 7.1 Main control loop The STLDC08 is an LED driver step-up controller dedicated to handheld equipment, having a typical voltage ranging from 0 1.5 V. The controller drives an N-channel Power MOSFET and implements ...
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Detailed description Figure 17. Timing diagram 1.7 V 1.7 V 2VCC 2VCC 1 OUT OUT DRV DRV ILED ILED PWMOUT PWMOUT Charge Pump Charge Pump active active ...
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STLDC08 7.5 Dimming When PWMOUT goes to zero, the LED current immediately goes to zero and the energy stored in the coil is discharged on the output capacitor, causing an increase in the output voltage. As soon as the PWM ...
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Application information 8 Application information 8.1 LED current programming The LED current is set by an external resistor connected between the FB pin and GND. The following equation can be used to calculate the value of the R the desired ...
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STLDC08 As a first approximation we choose the inductor ripple current the output current. Higher ripple current allows for smaller inductors, but it also increases the output capacitance for a given LED current ripple requirement. Conversely, lower ...
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Application information Equation 6 Where D is given by: MAX Equation 7 The value of the peak current on the inductor is given by the following equation: Equation 8 The minimum required saturation current of the inductor must be greater ...
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STLDC08 Equation 11 Equation 12 Equation 13 If the R of the main Power MOSFET is used to sense the current on the inductor the DS (ON) following procedure must be performed to choose the Power MOSFET. During ON time, ...
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Application information Figure 19. Current diagram ON state C C VBAT VBAT IN IN STLDC08 STLDC08 AM07849v1 AM07849v1 Figure 20. Current diagram OFF state VBAT VBAT STLDC08 STLDC08 AM07850v1 AM07850v1 Another important parameter is the drain source breakdown voltage. During ...
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STLDC08 8.6 Schottky diode selection Schottky diodes, with their low forward voltage and fast recovery time, are the ideal choice to maximize efficiency. The output diode in a boost converter conducts current only when the power switch is OFF. The ...
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... C3 2 GND EN/PWM Table 8. Bill of material optimized for 2 LEDs and I Reference Manufacturer C1 Murata C2 Murata C4 Murata C3, C5, C6 Murata L Coilcraft M1,M2 STMicroelectronics D1 STMicroelectronics Rfb Rs RF 22/29 TP1 VIN L1 1 TP5 C1 1 DRV U1 9 VCC DRV 6 EN/PWM SENSE 1 VOUT 2VCC 2 PWMOUT GND EXP 8 11 ...
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STLDC08 10 Layout suggestion Figure 22. Assembly layer Figure 23. Top layer Doc ID 18476 Rev 1 Layout suggestion 23/29 ...
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Layout suggestion Figure 24. Bottom layer 24/29 Doc ID 18476 Rev 1 STLDC08 ...
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STLDC08 11 Package mechanical data In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK® packages, depending on their level of environmental compliance. ECOPACK® specifications, grade definitions and product status are available at: ECOPACK® is ...
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Package mechanical data Dim. Min 0.18 D 2.85 D2 2.20 E 2. 0.30 ddd 26/29 DFN10 (3x3 mm) mechanical data mm. Typ. Max. 0.90 1.00 0.02 0.05 0.65 0.80 ...
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STLDC08 Tape & reel QFNxx/DFNxx (3x3) mechanical data Dim. Min 12 mm. Typ. Max. Min. 180 13.2 0.504 0.795 2.362 14.4 3.3 3.3 1 Doc ID ...
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Revision history 12 Revision history Table 9. Document revision history Date Revision 22-Feb-2011 1 28/29 First release. Doc ID 18476 Rev 1 Changes STLDC08 ...
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... STLDC08 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. ...