STCF01PMR STMicroelectronics, STCF01PMR Datasheet

IC LED DRIVER PHOTO FLASH 10-DFN

STCF01PMR

Manufacturer Part Number
STCF01PMR
Description
IC LED DRIVER PHOTO FLASH 10-DFN
Manufacturer
STMicroelectronics
Type
Photo Flash LEDr
Datasheet

Specifications of STCF01PMR

Constant Current
Yes
Topology
PWM, Step-Up (Boost)
Number Of Outputs
1
Internal Driver
Yes
Type - Primary
Flash/Torch
Type - Secondary
White LED
Frequency
1.2MHz ~ 1.8MHz
Voltage - Supply
2.6 V ~ 5.5 V
Voltage - Output
17V
Mounting Type
Surface Mount
Package / Case
10-DFN
Operating Temperature
-40°C ~ 85°C
Current - Output / Channel
300mA
Internal Switch(s)
Yes
Efficiency
80%
For Use With
497-6239 - BOARD EVAL FLASH DRIVER STCF01
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
497-6912-2
STCF01PMR

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
STCF01PMR
Manufacturer:
ST
0
Part Number:
STCF01PMR
Manufacturer:
ST
Quantity:
20 000
General features
Description
The STCF01 is a dedicated IC designed to drive
two, three, or four white, cell phone camera flash
LEDs with constant current. The step-up (boost)
converter input is connected directly to the battery,
and its converter output voltage is automatically
determined using current feedback-based duty
cycle control.
The STCF01 has a dedicated pin for two levels of
LED current selection. An external resistor is used
Order code
October 2006
Supply voltage range: 2.6V to 5.5V
17V Maximum output voltage
Two current levels up to 300mA set with
external resistors
Dedicated pin to select the required level of
current
Operating frequency: 1.5MHz: PWM Controller
Torch mode supported
Shutdown pin with true load disconnection
Efficiency: 90% at 100mA; 80% at 300mA
DFN10L (3mm x 3mm) Package
STCF01PMR
Part number
Step-up converter for cell phone camera flash LEDs
DFN10L (3mm x 3mm)
Package
Rev. 4
to set the required current for each level.
Compared to the linear current control technique,
this method allows designers to achieve the best
and most efficient performance possible with the
selected current, thereby avoiding linear element
losses.
The Shutdown (SHDN) pin saves power when the
camera flash is not used by consuming less than
0.1µA of current. When the SHDN pin is high
(logic '1'), the device is turned OFF and there is no
DC current path from the supply to the white LEDs
(Load Disconnect). If it is held to GND, the output
current continuously flows through the LEDs
(Torch mode). The SHDN pin, when it is set to low
(logic '0'), is also used to set the flash function
time duration.
DFN10L (3x3)
4500 parts per reel
Packaging
STCF01
www.st.com
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STCF01PMR Summary of contents

Page 1

... The STCF01 has a dedicated pin for two levels of LED current selection. An external resistor is used Order code Part number STCF01PMR October 2006 to set the required current for each level. Compared to the linear current control technique, this method allows designers to achieve the best ...

Page 2

Contents Contents 1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

Page 3

STCF01 1 Diagram Figure 1. Block diagram Diagram 3/16 ...

Page 4

Pin configuration 2 Pin configuration Figure 2. Pin connections (top view) Table 1. Pin description Pln N° Symbol This is the application power signal reference. Connect the input and output capacitors to 1 PWRGND this pin. This pin senses step-up ...

Page 5

STCF01 3 Application information Figure 3. Application circuit Application information 5/16 ...

Page 6

Maximum ratings 4 Maximum ratings Table 2. Absolute maximum ratings Symbol V DC Input Voltage to SGLGND I V Switch Voltage SW FB, SEL, Voltage Range SHDN, LC, HC OVP Over Voltage Protection ESD Human Body Model P Continuous Power ...

Page 7

STCF01 5 Electrical characteristics Table 4. DC Electrical characteristics (T = -40°C to 85° 8V, Typ. values @ 25°C, unless otherwise specified) OVP Symbol Parameter General section V Max Operation Supply Voltage I V Under Voltage ...

Page 8

Detailed description 6 Detailed description The STCF01 white Led boost converter drives from two up to four white LEDs with a constant current. It needs few external components: two ceramic capacitors (C inductor L=10µH and one schottky diode. The device ...

Page 9

STCF01 7 Typical operating characteristics (T = -40°C to 85° 8V, Typ. values @ 25°C, unless otherwise specified). Figure 4. Maximum output current vs input voltage Figure 6. Efficiency vs temperature Figure 8. Efficiency vs temperature = ...

Page 10

Typical operating characteristics . Figure 10. Feedback voltage vs temperature Figure 12 temperature I LC Figure 14. Peak inductor current vs temperature 10/16 Figure 11. Current feedback leakage vs temperature Figure 13 temperature I ...

Page 11

STCF01 . Figure 16. Maximum duty cycle vs temperature Figure 17. Turn on and off response Figure 18. Turn on time V =pulse, FREQ.=1Hz =10µs SHDN r f Figure 20. Multi shoot mode V =GND, V =pulse SEL ...

Page 12

Package mechanical data 8 Package mechanical data In order to meet environmental requirements, ST offers these devices in ECOPACK These packages have a Lead-free second level interconnect. The category of second level interconnect is marked on the package and on ...

Page 13

STCF01 DIM. MIN 0.45 DFN10 (3x3) MECHANICAL DATA mm. TYP MAX. 0.90 1.00 0.02 0.05 0.70 0.20 0.23 0.30 3.00 2.26 2.31 3.00 1.34 1.39 ...

Page 14

Package mechanical data Tape & Reel QFNxx/DFNxx (3x3) MECHANICAL DATA DIM. MIN 12 14/16 mm. TYP MAX. MIN. 330 13.2 0.504 0.795 2.362 18.4 3.3 3.3 1.1 4 ...

Page 15

STCF01 9 Revision history Table 5. Revision history Date Revision 10-Oct-2005 1 28-Apr-2006 2 27-Jul-2006 3 18-Oct-2006 4 First release. Maturity code has been changed. Change value in table TOT Text updates. Revision history Changes 15/16 ...

Page 16

... 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. ...

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