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 |