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ADP1655 Scheda tecnica(PDF) 7 Page - Analog Devices |
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ADP1655 Scheda tecnica(HTML) 7 Page - Analog Devices |
7 / 24 page ADP1655 Rev. 0 | Page 7 of 24 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TOP VIEW (BALL SIDE DOWN) Not to Scale PGND SGND VIN SW TORCH TX_MASK VOUT STROBE I2C/EN LED_OUT SDA/EN2 SCL/EN1 1 A B C D 23 BALL A1 INDICATOR Figure 4. Pin Configuration Table 5. Pin Function Descriptions Pin No. Mnemonic Type Description A1 PGND Ground Ground for Internal Switching FET. A2 SGND Ground Connect this pin at a single point to the power ground. A3 VIN Supply Connect the battery between VIN and PGND. Bypass VIN with a 10 μF, 6.3 V or greater X5R/X7R capacitor. B1 SW Output Connect a 2.2 μH inductor between SW and the battery. B2 TORCH Digital Input This pin enables the torch, provided that the device is not in flash or assist light mode. B3 TX_MASK Digital Input Connect a digital signal to the TX_MASK pin. When the logic level is driven high during a flash event the current is reduced to the torch level. C1 VOUT Output VOUT senses the output voltage of the boost converter and provides the input voltage to the LED current source. The VOUT pin features a comparator to detect an overvoltage condition if the LED string is open circuited. Connect a 10.0 μF capacitor between VOUT and PGND. C2 STROBE Digital Input/ Output The STROBE input is used to synchronize the timing of the camera module to the LED driver in I2C-compatible interface mode. In 2-bit logic interface mode, this acts as an output, indicating the number of LEDs attached. STROBE = high indicates two LEDs, whereas STROBE = low indicates one LED. C3 I2C/EN Digital Input A logic low selects the 2-bit logic interface, whereas logic high selects I2C-compatible interface. If I2C/EN is low and SDA/EN2 and SCL/EN1 are low, the driver enters shutdown mode with consumption < 1 μA. D1 LED_OUT Output White LED Anode Connection. Connect LED_OUT to the anode of the white LED. LED_OUT is internally connected to a programmable PMOS current source, which regulates the LED current. D2 SDA/EN2 Digital Input/ Output Data Input/Output (SDA). In 2-bit logic interface mode, SDA/EN2 is the second input bit of the digital interface. Second Input Bit (EN2). In I2C mode, SDA is the data input/output of the I2C-compatible interface. D3 SCL/EN1 Digital Input Clock Input (SCL). In 2-bit logic interface mode, SCL/EN1 is the first input bit of the digital interface. First Input Bit (EN1). In I2C mode, SCL is the clock input of the I2C-compatible interface. |
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