STLD20CP1PQR STMicroelectronics

STLD20CP1 Power management for white LED and camera flash Features Inductor step-up to 17 V output for 2 to 4 white LEDs in series from 2.8 V to 6 V supply Charge pump 2X, 1X output for 1 power flash/torch WLED Control pins to select shutdown mode Single-wire pulse dimming control for white QFN16 (3x3 mm) LED External resistor to set max current up to 300 mA in flash mode External resistor to set max current up to 100 mA in torch mode suitable for battery-powered applications. It is Logic input to select flash/strobe or movie/torch possible to select the value of the current flowing mode through the power white LED using two external Soft start limits inrush current resistors to choose the current value in torch mode or flash mode. Single-wire pulse dimming Internally limited inductor peak current control and shutdown of the white LEDs for Over-voltage and over-temperature protection. backlighting is obtained through two digital control Package: QFN16 (3x3 mm) pins: DM1 and DM2. The flash is driven by two logic pins: TF, to enable the flash function, and Temperature range: -40 C to 85 C SEL to select torch or flash mode. Other features include over-voltage and over-temperature Description protection, and inductor current limitation. The high efficiency of the STLD20CP1 makes it The STLD20CP1 is a power management device suitable for hand-held instruments and for the supply of white LED TFT backlighting particularly ideal in mobile phones. The MAIN/SUB display and camera flash. It is a 1.3 STLD20CP1 is available in a small, thin low- MHz PWM step-up switching regulator and 2X profile QFN16 (3x3 mm) package. and 1X charge pump. The current feedback control of the step-up provides excellent line transient response, making it particularly Table 1. Device summary Order code Package Packaging STLD20CP1PQR QFN16 (3x3 mm) Tape and reel November 2007 Rev 2 1/19 www.st.com 19 Obsolete Product(s) - Obsolete Product(s)Contents STLD20CP1 Contents 1 Diagram . 3 2 Pin description . 4 3 Maximum ratings 5 4 Truth tables 6 5 Electrical characteristics . 7 6 Application information 9 6.1 Step-up 9 6.2 Shutdown and brightness control 9 6.3 Peak inductor current limitation and soft start function . 11 6.4 Charge pump 11 6.5 Current on power LED (flash) 11 6.6 Over-voltage and short-circuit protection . 11 6.7 Start-up procedure 11 6.8 Thermal shutdown 12 7 Package mechanical data 14 8 Revision history . 18 2/19 Obsolete Product(s) - Obsolete Product(s)