LP8863-Q1 是带有升压控制器的汽车高效 LED 驱动器。六路高精度电流阱支持相移,它可根据使用的通道数自动调整。可通过 SPI 或 I2C 接口单独和全局控制电流阱亮度;也可以通过 PWM 输入全局控制亮度。
升压控制器具有基于 LED 电流阱余量电压的自适应输出电压控制。该特性可在所有条件下将电压调节到能够满足需要的最低水平,从而更大限度降低功耗。凭借宽范围可调频率,LP8863-Q1 能够避免 AM 无线电频带的干扰。
LP8863-Q1 支持内置混合 PWM 和电流调光,从而降低了 EMI、延长了 LED 使用寿命并提高了总光学效率。
| 器件编号 | 封装 | 封装尺寸(标称值) |
|---|---|---|
| LP8863-Q1 | HTSSOP (38) | 9.70mm x 4.40mm |
Changes from A Revision (June 2017) to B Revision
Changes from * Revision (March 2017) to A Revision
| LP8863-Q1 | LP8860-Q1 | LP8862-Q1 | LP8861-Q1 | TPS61193-Q1 | TPS61194-Q1 | TPS61196-Q1 | |
| VIN range | 3 V to 48 V | 3 V to 48 V | 4.5 V to 45 V | 4.5 V to 45 V | 4.5 V to 45 V | 4.5 V to 45 V | 8 V to 30 V |
| Number of LED channels | 6 | 4 | 2 | 4 | 3 | 4 | 6 |
| LED current / channel | 150 mA | 150 mA | 160 mA | 100 mA | 100 mA | 100 mA | 200 mA |
| I2C/SPI support | Yes | Yes | No | No | No | No | No |
| SEPIC support | Yes | No | Yes | Yes | Yes | Yes | No |
| PIN | TYPE | DESCRIPTION | |
| NO. | NAME | ||
| 1 | VDD | Power | Power input for LDO, charge pump, and analog blocks - a 4.7–µF decoupling capacitor is recommended. |
| 2 | SD | Analog | Power line FET control. If unused, leave this pin floating. |
| 3 | VSENSE_N | Analog | Pin for input current sense. If input current sense is not used tie to VSENSE_P. |
| 4 | VSENSE_P | Analog | Pin for OVP/UVLO protection and input current sense. |
| 5 | C1N | Analog | Negative pin for charge pump flying capacitor. If feature not used, leave this pin floating. |
| 6 | C1P | Analog | Positive pin for charge pump flying capacitor. If feature not used, leave this pin floating. |
| 7 | CPUMP | Power | Charge pump output pin. If charge pump is not used connect to VDD. TI recommends a 10–µF decoupling capacitor. |
| 8 | CPUMP | Power | Charge pump output pin. If charge pump is not used connect to VDD. |
| 9 | GD | Analog | Gate driver output for boost FET |
| 10 | GD | Analog | Gate driver output for boost FET |
| 11 | PGND | Ground | Power ground |
| 12 | PGND | Ground | Power ground |
| 13 | ISNSGND | Ground | Current sense resistor GND of boost controller |
| 14 | ISNS | Analog | Boost current sense pin |
| 15 | FB | Analog | Boost feedback input |
| 16 | DISCHARGE | Analog | Boost output voltage discharge pin. Leave floating if unused. |
| 17 | LED5 | Analog | LED current sink output. If unused tie to ground. |
| 18 | LED4 | Analog | LED current sink output. If unused tie to ground. |
| 19 | LED3 | Analog | LED current sink output. If unused tie to ground. |
| 20 | LED2 | Analog | LED current sink output. If unused tie to ground. |
| 21 | LED1 | Analog | LED current sink output. If unused tie to ground. |
| 22 | LED0 | Analog | LED current sink output. If unused tie to ground. |
| 23 | ISET | Analog | LED current setting input |
| 24 | EN | Input | Enable input |
| 25 | VDDIO | Power | Supply input for digital IO pins - a 4.7–µF decoupling capacitor is recommended. |
| 26 | INT | Output | LP8863-Q1 device fault interrupt output, open drain. Requires an external pullup resistor to VDDIO - a 10-kΩ pullup resistor is recommended. |
| 27 | IFSEL | Input | Serial control interface selection: low = SPI, high = I2C |
| 28 | BST_SYNC | Input | Input for synchronizing boost. When synchronization is not used, connect this pin to ground to disable spread spectrum or to VDDIO to enable spread spectrum. |
| 29 | SDO_PWM | Input/Output | IFSEL=GND, slave data output for SPI. IFSEL=VDDIO, PWM input for brightness control. Tie to GND if unused. |
| 30 | SDI_SDA | Input | IFSEL=GND, slave data input for SPI; IFSEL=VDDIO, serial data for I2C |
| 31 | SCLK_SCL | Input | IFSEL=GND, serial clock for SPI; IFSEL=VDDIO, serial clock for I2C |
| 32 | SS_ADDRSEL | Input | IFSEL=GND, slave select for SPI; IFSEL=VDDIO, I2C address selection |
| 33 | BST_FSET | Analog | Resistor for setting boost FSW frequency. Do not leave floating. |
| 34 | PWM_FSET | Analog | Resistor for setting LED PWM frequency. Do not leave floating. |
| 35 | NC | N/A | No connect — leave floating. |
| 36 | NC | N/A | No connect — leave floating. |
| 37 | VLDO | Power | Internal 1.8-V LDO output. Connect bypass capacitor to this pin - a 10–µF decoupling capacitor is recommended. |
| 38 | GND | Ground | Ground for LDO — charge pump and analog blocks |
| DAP | GND_LED | Ground | LED ground connection |
| MIN | MAX | UNIT | ||
|---|---|---|---|---|
| Voltage on pins | V_SENSE_P, VSENSE_N, SD, LED0 to LED5, FB, DISCHARGE | -0.3 | 50 | V |
| VDD, EN, ISNS | -0.3 | 5.5 | ||
| Voltage on pins | VDDIO, SCLK_SCL, SDI_SDA, SDO_PWM, SS_ADDRSEL, INT, IFSEL, BST_FSET, PWM_FSET, ISET | -0.3 | 3.6 | V |
| C1P, C1N, CPUMP(2), GD | -0.3 | 12 | ||
| VLDO | -0.3 | 2 | ||
| Thermal | Continuous power dissipation | Internally limited | Internally limited | |
| Ambient temperature | -40 | 125 | °C | |
| Junction temperature | -40 | 150 | °C | |
| Maximum lead temperature (soldering) | 260 | °C | ||
| Storage temperature, Tstg | -65 | 150 | °C |
| VALUE | UNIT | |||||
|---|---|---|---|---|---|---|
| V(ESD) | Electrostatic discharge | Human body model (HBM), per AEC Q100-002,(1) | ±2000 | V | ||
| Charged-device model (CDM), per AEC Q100-011 | All pins | ±500 | ||||
| Corner pins | ±750 | |||||