stcf03i STMicroelectronics, stcf03i Datasheet
stcf03i
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stcf03i Summary of contents
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... Camera flashes/strobe ■ PDAs and digital still cameras Description The STCF03I is a high efficiency power supply solution to drive a single flash LED in camera phone, PDAs and other hand-held devices buck - boost converter to guarantee a proper LED current control over all possible conditions of battery voltage and output voltage ...
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Contents 1 Description (continued ...
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TCH_ON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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List of figures Figure 1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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List of tables Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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Description (continued) Hard and soft-triggering of Flash are both supported. The device includes many functions to protect the chip and the power LED, such as: a soft start control, chip over temperature detection and protection, as well as opened ...
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Diagram Figure 1. Block diagram 7/33 NTC_REF NTC_REF ...
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Pin configuration Figure 2. Pin connections (bottom view) Table 2. Pin description Pin n° Symbol E1,D2 VLX2 B3 RX D1,C2 VOUT A4 NTC B5 FB1 A5 FB2 B4 FB2S E2 GND C5 TMSK D5 AUXL D4 ADD A3 VBAT ...
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Maximum ratings Table 3. Absolute maximum ratings (see note) Symbol VBAT Signal supply voltage PVBAT Power supply voltage VLX1A, VLX1B Inductor connection 1 VLX2 Inductor connection 2 VOUT Output Voltage AUXL Auxiliary LED FB1, FB2, FB2S Feedback and sense ...
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... TDK FLASH NTC Murata LED Luxeon LED Note: All of the above listed components refer to typical application. Operation of the STCF03I is not limited to the choice of these external components. 10/ Slave Addresses. Part number Value 10 µF X5R0J106M 1 µF X5R0J105M 4.7 µH VLF3012ST-4R7MR91 VLF4012AT-4R7M1R1 4.7 µ ...
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Electrical characteristics Table 6. Electrical characteristics (T = 25° 3.6 V, 2xC = 10 µ Typ. values @25°C, unless otherwise specified). Symbol Parameter V Input operation supply voltage I V Power ON reset ...
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Table 6. Electrical characteristics (T = 25° 3.6 V, 2xC = 10 µ Typ. values @25°C, unless otherwise specified). Symbol Parameter NTC_REF NTC reference voltage V Output logic signal level low OL ATN I ...
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... ATN pin This output pin (open-drain, active LOW) is provided to better manage the information transfer from the STCF03I to the µP. Because of the limitations of a Single Master I configuration, the µP should regularly poll the STCF03I to verify if certain operations have been completed check diagnostic information. Alternatively, the µP can use the ATN pin to be advised that new data are available in the STAT_REG, thus avoiding continuous polling ...
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... I C BUS interface Data transmission from the main µP to STCF03I and vice versa takes place through the bus interface wires, consisting of the two lines SDA and SCL (pull-up resistors to a positive supply voltage must be externally connected). The recommended maximum voltage of these signals should be 3 ...
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Data validity As shown in Figure clock. The HIGH and LOW state of the data line can only change when the clock signal on the SCL line is LOW. Figure 4. Data validity on the I 7.5 Start and ...
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... The master (µP) puts a resistive HIGH level on the SDA line during the acknowledge clock pulse (see Figure 7). The peripheral (STCF03I) that acknowledges has to pull-down (LOW) the SDA line during the acknowledge clock pulse, so that the SDA line is stable LOW during this clock pulse. The peripheral which has been addressed has to generate an acknowledge pulse after the reception of each byte, otherwise the SDA line remains at the HIGH level during the ninth clock pulse duration ...
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... R/W bit, which this case. R means a reading operation. Then the master waits for an acknowledge from STCF03I. Then the 8 bit address of register is sent to STCF03I also followed by an acknowledge pulse. The last transmitted byte is the data that is going to be written to the register again followed by an acknowledge pulse from STCF03I ...
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... STCF03I again. Then the master generates a START bit again and sends the device address followed by the R/W bit, which is 1 now. STCF03I confirms the receiving of the address + R/W bit by an acknowledge pulse and starts to send the data to the master. No acknowledge pulse from the master is required after receiving the data ...
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Figure 10. Reading from a single register DEVICE DEVICE ADDRESS ADDRESS 7 bits 7 bits 7.12 Reading from multiple registers with incremental addressing Reading ...
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... PWR_ON=1. LED current is controlled by the value set by the FDIM_0~3 of the DIM_REG. 8.3 TCH_ON When set from Ready Mode, the STCF03I enters Torch mode. The LED current is controlled by the value set by the TDIM_0~3 of the DIM_REG. 8.4 NTC_ON When the NTC_ON bit is set to HIGH and the device is in Ready mode, then the comparators that monitor the LED temperature are activated ...
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... FTIM_0~3 This 4-bits register defines the maximum Flash duration intended to limit the energy dissipated by the LED to a maximum safe value or to leave to the STCF03I the control of the Flash duration during normal operation. Values from 0~15 correspond to 0~1.5 s (100 ms steps). The timing accuracy is related to the internal oscillator frequency that clocks the Flash Time Counter (+/-20%, TBD) ...
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Table 12. Auxiliary register AUX_REG MSB (write mode) SUB ADD=02 AUXI_3 Power ON, 0 SHUTDOWN MODE RESET Value 8.8 AUXI_0~3 This 4 bits register defines the AUX LED current from mA. See AUX LED Dimming Table for ...
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... This bit is reset by the STCF03I following a read operation of the STAT_REG. 8.13 NTC_H This bit is set HIGH by the STCF03I and the ATN pin is pulled down, when the voltage seen on the pin Rx exceeds V value at the LED measured by the NTC. The device is put in Ready mode to avoid damaging the LED ...
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... VOUTOK_N This bit is set by the STCF03I used to protect the device, if the output is shorted. The VOUTOK_N bit is set to HIGH at the start-up. Then a current generator charges the output capacitor for 360 µs typ. and it detects when the output capacitor reaches 100 mV ...
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... The registers are reset to their default values, the ATN and SDA pins are in high-Z, and the I reading the ADD pin configuration. After the internally defined time has elapsed, the STCF03I automatically enters the Stand-by mode. 9.2 Shutdown In this mode, only the I The device enters this mode: automatically from Power ON Reset status ...
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... The first solution is recommended for an accurate start time, while the second is less accurate because of the I STCF03I internal temporization and its accuracy is determined by the internal oscillator. For hard-triggering necessary to set the TRIG_EN bit in advance. For soft-triggering, the TRIG pin has to be kept High (logic level or wired to V setting the FTIM and the TRIG_EN through I a delay time between the moment the Flash is triggered and when it appears ...
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Typical performance characteristics 10 Figure 14. Flash current vs F_DIMM 900 900 800 800 700 700 600 600 500 500 400 400 300 300 200 200 100 100 ...
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Figure 20. Efficiency 2.5 2 3.5 3 [V] [ Figure 22. Line ...
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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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TFBGA25 mechanical data Dim. Min 0.78 b 0. 30/33 mm. Typ. Max. Min. 1.1 1.16 39.4 0.25 0.86 30.7 0.30 0.35 9.8 3.0 3.1 114.2 2 3.0 3.1 ...
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Tape & reel TFBGA25 mechanical data Dim. Min 12 3.9 P 7.9 31/33 mm. Typ. Max. Min. 330 13.2 0.504 0.795 2.362 14.4 3.3 3.3 1.60 4.1 0.153 8.1 ...
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Revision history Table 17. Document revision history Date Revision 23-Jul-2007 1 27-Aug-2007 2 05-Sep-2007 3 12-Sep-2007 4 32/33 Changes First release. Table 5. updated. Add row NTC_REF on Table 6. Figure 2. title changed. ...
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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. ...