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고출력 LED 플래쉬 드라이버 모듈 -CAT3224
(LED Flash click)
개요
- 본 제품은 고출력 LED 플래쉬와 같이 동작하는 제품으로 CAT3224 플래쉬 LED 드라이버가 장착되어 있습니다.
- 리튬 배터리로 동작하는 시스템에 적합하며, 최대 4A LED 플래쉬 펄스를 전달합니다.
- 5V전원으로 동작합니다.
특징
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CAT3224 features
The CAT3224 is a very high−current integrated flash LED driver which also supports the charging function for a dual−cell supercapacitor applications. Ideal for Li−ion battery−powered systems, it delivers up to 4A LED flash pulses, far beyond the peak current capability of the battery.
Dual−mode 1x/2x charge pump charges the stacked supercapacitor to a nominal voltage of 5.4 V, while an active balance control circuit ensures that both capacitor cell voltages remain matched.
The driver also features two matched current sources. External resistors provide the adjustment for the maximum flash mode current (up to 4 A) and the torch mode current (up to 400 mA). A built−in safety timer automatically terminates the flash pulse beyond a maximum duration of 300 ms.
The CAT3224 has a shutdown mode that is so low that ON Semiconductor can safely call it "zero" mode. In this mode, it typically uses only 1μA. -
Information about the LED indicators
On the LED Flash click there are three different LED indicators, here is how they operate:
CHARGE — When this LED is on the driver is in charge mode.
READY — When this LED is on it indicates that the supercapacitor is fully charged.
PWR — Indicates if power is present.
Additional information about the pins
FLAG is an active−low open−drain output that notifies the microcontroller that the supercapacitor is fully charged by pulling the output low (pin 15 in the mikroBUS). When using FLAG, this pin should be connected to a positive rail via an external pull−up resistor.
TORCH is the torch mode enable pin. When high, the LED current sources are enabled in torch mode.
FLASH is the flash mode enable pin. When high, the LED current sources are enabled in flash mode. If FLASH is kept high for longer than 300 ms typical, the LED channels are automatically disabled.
LEDA, LEDB are connected internally to the current sources and must be connected to the LED anodes. Each output is independently current regulated. These pins enter a high−impedance 'zero' current state whenever the device is placed in shutdown mode or FLASH and TORCH are low.
Specifications
Type LED Segment Applications Applications that require a high power LED flash On-board modules CAT3224 flash LED driver Key Benefits Flash mode and Torch mode Interface GPIO Input Voltage 5V,5V Click board size M (42.9 x 25.4 mm) Pinout diagram
This table shows how the pinout on LED Flash click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).
Notes Pin 
Pin Notes Charge Supercapacitor Enable CH_ENA 1 AN PWM 16 TOR Torch Enable Flash Enable FLS 2 RST INT 15 FLG Flash Ready Flag output, Open drain (Active low) NC 3 CS TX 14 NC NC 4 SCK RX 13 NC NC 5 MISO SCL 12 NC NC 6 MOSI SDA 11 NC Not conncted NC 7 3.3V 5V 10 +5V Power supply Ground GND 8 GND GND 9 GND Ground
문서
연관제품
- 연관제품 1
