Zakładka z wyszukiwarką danych komponentów |
|
STCF01PMR Arkusz danych(PDF) 8 Page - STMicroelectronics |
|
STCF01PMR Arkusz danych(HTML) 8 Page - STMicroelectronics |
8 / 16 page 6 Detailed Description STCF01 8/16 6 Detailed Description The STCF01 white Led boost converter drives two up to four white LEDs with a constant current. It needs few external components: two ceramic capacitors (CI=2.2µF CO=4.7µF), one inductor L=10µH and one schottky diode. The device works with a minimum VI=2.6V, and it has an Over Voltage Protection on the output guaranteed at minimum value equal to 17V. This value ensures proper operation with a maximum of four White LEDs in series. In the worst case of VI=2.6V at VOVP=8V (typical value of two LEDs) it is possible to obtain IO=270mA, while at VOVP=11V (typical value of three LEDs) it is possible obtain IO=180mA (Figure 4: Maximum Output Current Vs Input Voltage). The maximum IO current is limited by inductor peak current internally set at Typ 1.2A. This feature allows saving the battery life from intensive use of the flash. The SEL pin allows to select high and low current value flowing on the White LEDs. The two current values are set through external resistors RHC and RLC according the following formula: ILED(FLASH) = 2100 * (VI - VHC) / RHC ILED(TORCH) = 2400 * (VI - VLC) / RLC An High logic level on SHDN pin puts the device in shutdown mode; if it is hold to Low the flash or torch mode is activated. When the SHDN pin is LOW the device provides the requested current in less than 200µs (see TURN ON TIME plot). This fast turn-on time makes the device suitable for single shoot and multiple shoot operation modes. |
Podobny numer części - STCF01PMR |
|
Podobny opis - STCF01PMR |
|
|
Link URL |
Polityka prywatności |
ALLDATASHEET.PL |
Czy Alldatasheet okazała się pomocna? [ DONATE ] |
O Alldatasheet | Reklama | Kontakt | Polityka prywatności | Linki | Lista producentów All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |