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Pin configuration

STCF03

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3 Pin

configuration

Figure 2.

Pin connections (bottom view)

TFBGA25 (3x3)

QFN20 (3x3)

Table 2.

Pin description

Pin n° for

QFN20

Pin n° for

TFBGA25

Symbol

Name and function

E1, D2

VLX2

Inductor connection

Rx resistor connection

NTC

NTC resistor connection

D1, C2

VOUT

Output voltage

FB1

Feedback pin [I

LED

*(R

)]

FB2

bypass

FB2S

Feedback sensing pin [I

LED

]

GND

Signal ground

ADD

C address selection

AUXL

Auxiliary LED output

TMSK

TX mask input.

B1, C1

PVBAT

Power supply voltage

VBAT

Supply voltage

VLX1A

Inductor connection

A1, B2

VLX1B

Inductor connection

SCL

C clock signal

SDA

C data

C3, D3

PGND

Power ground

ATN

Attention (open drain output, active LOW)

TRIG

Flash trigger input

Exposed pad

PGND

To be connected to the PCB ground plane for optimal electrical and
thermal performance.

Содержание STCF03

Страница 1: ...ned and shorted led failure detection and protection Chip over temperature detection and protection 1 A shutdown current Packages QFN20 4x4 TFBGA25 3x3 Applications Cell phone and smart phone Camera f...

Страница 2: ...3 ATN pin 13 7 2 4 ADD pin 14 7 2 5 TMSK pin 14 7 3 I2 C BUS interface 14 7 4 Data validity 14 7 5 Start and stop conditions 15 7 6 Byte format 15 7 7 Acknowledge 16 7 8 Writing to a single register 1...

Страница 3: ...9 Detailed description 25 9 1 PowerON reset 25 9 2 Shutdown shutdown with NTC 25 9 3 Ready mode 25 9 4 Single or multiple Flash using external P temporization 25 9 5 External P temporization using TRI...

Страница 4: ...addressing 18 Figure 10 Reading from a single register 18 Figure 11 Reading from multiple registers 19 Figure 12 Flash and Torch current vs dimming value 21 Figure 13 VOUTOK_N behavior 24 Figure 14 E...

Страница 5: ...F L 4 7 H RFL 0 27 RTR 1 8 RX 15 K Typ values 25 C unless otherwise specified 11 Table 7 Address table 14 Table 8 Interface protocol 16 Table 9 I2C Register mapping function 20 Table 10 Command regis...

Страница 6: ...programmable Time Out function protects the LED in case of a wrong command from the P An optional external NTC resistor is supported to protect the LED against over heating In mobile phone applicatio...

Страница 7: ...Diagram STCF03 7 35 2 Diagram Figure 1 Block diagram...

Страница 8: ...5 FB2 RTR bypass 7 B4 FB2S Feedback sensing pin ILED RFL 8 E2 GND Signal ground 9 D4 ADD I2 C address selection 10 D5 AUXL Auxiliary LED output 11 C5 TMSK TX mask input 12 B1 C1 PVBAT Power supply vol...

Страница 9: ...iliary LED 0 3 to VI 0 3 V FB1 FB2 FB2S Feedback and sense voltage 0 3 to 3 V SCL SDA TRIG ATN ADD TMSK Logic Pin 0 3 to VI 0 3 V RX Connection for reference resistor 0 3 to 3 V NTC Connection for LED...

Страница 10: ...n Operation of the STCF03 is not limited to the choice of these external components Figure 3 Application schematic Table 5 List of external components Component Manufacturer Part number Value Size CI...

Страница 11: ...IAUXLED Ready mode VI 3 3 V to 5 5 V 0 20 VO Regulated voltage range 2 5 5 3 V FB1 Feedback voltage Torch mode 30 250 mV FB2 Feedback voltage Flash mode 30 250 mV IO Output current tolerance Flash mod...

Страница 12: ...gnal level low ATN IOL 10 mA 0 2 V IOZ Output logic leakage current ATN VOZ 3 3 V 1 mA VIL Input logic signal level SCL SDA TRIG TEST ADD VI 2 7 V to 5 5 V 0 0 4 V VIH 1 4 3 TON LED current rise time...

Страница 13: ...es can occur Boost region VO VBAT this configuration is used in most of the cases as the output voltage VO VfLED ILED x RFL is higher than VBAT Buck region VO VBAT Buck Boost region VO VBAT 7 2 Logic...

Страница 14: ...ovided to be externally wired to GND if TX masking function is not used 7 3 I2 C BUS interface Data transmission from the main P STCF03 and vice versa takes place through the 2 wires I2C bus interface...

Страница 15: ...s HIGH A STOP condition must be sent before each START condition 7 6 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...

Страница 16: ...upply is below the undervoltage lockout threshold 7 8 Writing to a single register Writing to a single register starts with a START bit followed by the 7 bit device address of STCF03 The 8th bit is th...

Страница 17: ...ster when writing to multiple registers STCF03 supports writing to multiple registers with incremental addressing When the data is written to a register the address register is automatically increased...

Страница 18: ...e next register can start immediately without sending the device address and Figure 9 Writing to multiple register with incremental addressing S T A R T DEVICE ADDRESS 7 bits A C K W R I T E M S B L S...

Страница 19: ...A C K R W R E A D DEVICE ADDRESS 7 bits DATA i A C K S T O P L S B DATA i 1 A C K L S B DATA i 2 A C K L S B DATA i 2 L S B DATA i n M S B M S B M S B M S B A C K L S B N O A C K SDA LINE S T A R T DE...

Страница 20: ...ust be set in advance Both triggering modes can benefit of the internal Flash Time Counter that uses the TRIG_EN bit and can work either as a safety shut down timer or as a Flash duration timer Flash...

Страница 21: ...ed by resetting TRIG_EN bit and simultaneously the ATN pin is set to true LOW to alert the P that the maximum time has been reached FTIM value remains unaltered at the end of the count 8 6 TDIM_0 3 Th...

Страница 22: ...XI register Note LED current values refer to RFL 0 27 RTR 1 8 Table 12 Auxiliary register AUX_REG write mode MSB LSB SUB ADD 02 AUXI_3 AUXI_2 AUXI_1 AUXI_0 AUXT_3 AUXT_2 AUXT_1 AUXT_0 Power ON SHUTDOW...

Страница 23: ...ld corresponds to a warning temperature value at the LED measured by the NTC The device is still operating but a warning is sent to the P This bit is reset by the STCF03 following a read operation of...

Страница 24: ...is never reached the bit stays HIGH ATN pin is pulled down and the device will not start This bit is reset following a read operation of the STAT_REG Figure 13 VOUTOK_N behavior Table 16 Status regis...

Страница 25: ...gister settings are allowed to be executed immediately Only in this mode the Auxiliary LED is operational and can be turned ON and set at the desired brightness using the AUX REGISTER The device enter...

Страница 26: ...g it is 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 VBAT and the Flash can be started by setting the FTIM and the TRIG_EN t...

Страница 27: ...55mA 0 50 100 150 200 250 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 step mA VI 2 7V VI 3 6V VI 5 5V 0 50 100 150 200 250 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 step mA VI 2 7V VI 3 6V VI 5 5V 0 100...

Страница 28: ...emp VI 5 5V Ready Mode Figure 21 Start Up in Flash Mode 800mA at VI 3 6V Figure 22 Line transient in Flash Mode 800mA change of VI from 2 7V to 3 3V in 10 s 0 0 5 1 1 5 2 2 5 3 40 C 25 C 85 C Temp mA...

Страница 29: ...packages have a Lead free second level interconnect The category of second level interconnect is marked on the package and on the inner box label in compliance with JEDEC Standard JESD97 The maximum...

Страница 30: ...1 6 157 5 163 4 D1 3 75 147 6 D2 A 1 55 1 70 1 85 61 0 66 9 72 8 D2 B 1 95 2 10 2 25 76 8 82 7 88 6 D2 C 2 15 2 30 2 45 84 6 90 6 96 5 E 3 85 4 00 4 15 151 6 157 5 163 4 E1 3 75 147 6 E2 A 1 55 1 70 1...

Страница 31: ...p Max Min Typ Max A 1 0 1 1 1 16 39 4 43 3 45 7 A1 0 25 9 8 A2 0 78 0 86 30 7 33 9 b 0 25 0 30 0 35 9 8 11 8 13 8 D 2 9 3 0 3 1 114 2 118 1 122 0 D1 2 78 8 E 2 9 3 0 3 1 114 2 118 1 122 0 E1 2 78 8 e...

Страница 32: ...32 35 Dim mm inch Min Typ Max Min Typ Max A 330 12 992 C 12 8 13 2 0 504 0 519 D 20 2 0 795 N 99 101 3 898 3 976 T 14 4 0 567 Ao 4 35 0 171 Bo 4 35 0 171 Ko 1 1 0 043 Po 4 0 157 P 8 0 315 Tape reel Q...

Страница 33: ...35 Dim mm inch Min Typ Max Min Typ Max A 330 12 992 C 12 8 13 2 0 504 0 519 D 20 2 0 795 N 60 2 362 T 14 4 0 567 Ao 3 3 0 130 Bo 3 3 0 130 Ko 1 60 0 063 Po 3 9 4 1 0 153 0 161 P 7 9 8 1 0 311 0 319 T...

Страница 34: ...evision history Table 17 Document revision history Date Revision Changes 30 Jan 2007 1 First Release 27 Mar 2007 2 The OVP min value on table 5 is changed 5 5 V 5 3 V 28 Aug 2007 3 Table 5 updated 12...

Страница 35: ...NTIES OF MERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION OR INFRINGEMENT OF ANY PATENT COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT UNLESS E...

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