stcf05tbr STMicroelectronics, stcf05tbr Datasheet
stcf05tbr
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stcf05tbr Summary of contents
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... Chip overtemperature detection and protection ■ Less than 1 µA standby current ■ Package TFBGA25 Table 1. Device summary Order code STCF05TBR July 2010 High power white LED driver with I²C interface Applications ■ Cell phones and smartphones ■ Camera flashes/strobe ■ ...
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Contents Contents 1 Description (continued ...
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STCF05 9.1 PWR_ON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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List of tables List of tables Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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STCF05 List of figures Figure 1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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Description (continued) 1 Description (continued) An optional external NTC is supported to protect the LEDs against over heating. In mobile phone application it is possible to reduce immediately the flash LEDs current during the signal transmission using the TMSK pin. ...
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STCF05 2 Diagram Figure 1. Block diagram Doc ID 15257 Rev 4 Diagram 7/33 ...
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Pin configuration 3 Pin configuration Figure 2. Pin connections (top view) Table 2. Pin description Ball n° E1, D1 C1, C2, C3, C4, ...
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STCF05 4 Maximum ratings Table 3. Absolute maximum ratings Symbol VBAT Signal supply voltage VLX Inductor connection OUT Output voltage AUXL Auxiliary LED LED LEDs connection SCL, SDA, TRIG, Logic pin ATN, ADD TMSK R Connection for reference resistor X ...
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Application 5 Application Figure 3. Application schematic **: Connect GND or SDA or SCL to choose one of the 4 different I²C slave addresses. I ***: Optional components to support auxiliary functions. V Table 5. List ...
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STCF05 6 Electrical characteristics ° 3 °C, unless otherwise specified. Table 6. Electrical characteristics Symbol Parameter Input operating supply V IN voltage V Power ON reset PW_ON ...
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Electrical characteristics Table 6. Electrical characteristics (continued) Symbol Parameter Output logic leakage I OZ current ATN V Low and high level input IL logic signals on SCL, V SDA, TRIG, TEST IH LED current rise time ...
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STCF05 7 Detailed description 7.1 Introduction The STCF05 is a synchronous boost converter, dedicated to power and control the current of power white LEDs in a camera cell phones. The device operates at a typical constant switching frequency of 1.8 ...
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Detailed description 7.3.4 ADD pin With this pin it is possible to select one of the 4 possible I²C slave addresses. Neither internal pull-up nor pull-down is provided. The pin has to be connected to either GND, V SCL or ...
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STCF05 8 I²C bus interface Data transmission from the main microprocessor to STCF05 and vice versa takes place through the 2 I²C bus interface wires, consisting of the two lines SDA and SCL (pull-up resistors to a positive supply voltage ...
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I²C bus interface Figure 5. Timing diagram on I²C bus 8.3 Byte format Every byte transferred to the SDA line must contain 8 bits. Each byte must be followed by an acknowledge bit. The MSB is transferred first. One data ...
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STCF05 Figure 7. Acknowledge on I²C bus 8.5 Interface protocol The interface protocol is composed start condition (START Device address + R/W bit (read =1 / write = Register address byte - A ...
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I²C bus interface Figure 8. Writing to a single register DEVICE DEVICE DEVICE ADDRESS ADDRESS ADDRESS 7 bits 7 bits 7 bits ...
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STCF05 acknowledge pulse and starts to send the data to the master. No acknowledge pulse from the master is required after receiving the data. Then the master generates a STOP bit to terminate the communication. See Figure 10. Reading from ...
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I²C bus interface Table 9. I²C register mapping read function Register name CMD_REG DIM_REG AUX_REG STAT_REG Table 10. Command register CMD_REG MSB (write mode) SUB ADD=00 PWR_ON Power ON 0 RESET Value Table 11. Dimming register DIM_REG MSB (write mode) ...
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STCF05 9 Registers description 9.1 PWR_ON When set, it activates all analog and power internal blocks including the NTC supporting circuit, and the device is ready to operate (ready mode). As long as PWR_ON=0, only the I²C interface is active, ...
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Registers description 9.7 FDIM_0~2 These 3 bits define the LED current in flash mode in 8 exponential steps. Max current value in flash mode is 400 mA. 9.8 LDIM Is an internal dimming register. It cannot be accessed by the ...
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STCF05 9.10 AUXT_0~3 This 4 bit register controls the timer that defines the ON-time of the AUX LED current source. ON-time starts when the AUXI register is loaded with any value other than zero, and stops after the time defined ...
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Registers description 9.13 LED_O This bit is set by the STCF05 when the voltage seen on the VOUT pin is V during a torch or flash operation. This condition can be caused by an open LED, indicating a LED failure. ...
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STCF05 Figure 13. VOUTOK_N behavior Table 16. Status register details F_RUN Bit name LED_S (STAT_ REG) Default 0 0 value Latched YES NO (1) Forces Ready NO NO mode when set Sets ATN LOW YES NO when set 1. YES ...
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Detailed description 10 Detailed description 10.1 Power ON reset This mode is initiated by applying a supply voltage above the VPW_ON RESET threshold value. An internal timing (~ 1 µs) defines the duration of this status. The logic blocks are ...
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STCF05 by strobing the TRIG pin. Time-out counter will cumulate every flash on-time until the defined time-out is reached, unless it is reloaded by updating the CMD_REG. After a single or multiple flash operations are timed-out, the device automatically goes ...
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Typical performance characteristics Typical performance characteristics 11 Figure 14. Efficiency in flash mode =7V =7V OUT OUT 2.5 2 3.5 3 ...
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STCF05 12 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: is ...
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Package mechanical data Dim. Min 0.78 b 0. 30/33 TFBGA25 mechanical data mm. Typ. Max. 1.1 1.16 0.25 0.86 0.30 0.35 3.0 3.1 2 3.0 3.1 2 0.5 ...
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STCF05 Tape & reel TFBGA25 mechanical data Dim. Min 12 3.9 P 7.9 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 13 Revision history Table 17. Document revision history Date Revision 09-Dec-2008 1 30-Mar-2009 2 26-Apr-2010 3 28-Jul-2010 4 32/33 Initial release. Modified Figure 17 and Figure 19 on page Modified Figure 18 on page 28. Modified Table 3 ...
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... STCF05 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. ...