SNVSBC7 August 2019 LP8867C-Q1 , LP8869C-Q1
PRODUCTION DATA.
The LP8867C-Q1, LP8869C-Q1 is an automotive highly-integrated, low-EMI, easy-to-use LED driver with DC-DC converter. The DC-DC converter supports both boost and SEPIC mode operation. The device has four or three high-precision current sinks that can be combined for higher current capability.
The DC-DC converter has adaptive output voltage control based on the LED forward voltages. This feature minimizes the power consumption by adjusting the voltage to the lowest sufficient level in all conditions. For EMI reduction DC-DC supports spread spectrum for switching frequency and an external synchronization with dedicated pin. A wide-range adjustable frequency allows the LP886xC-Q1 to avoid disturbance for sensitive frequency band.
The input voltage range for the LP886xC-Q1 is from 4.5 V to 40 V to support automotive stop, start and load dump condition. The LP886xC-Q1 integrates extensive fault detection features.
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
LP8867C-Q1 | HTSSOP (20) | 6.50 mm × 4.40 mm |
LP8869C-Q1 |
DATE | REVISION | NOTES |
---|---|---|
August 2019 | * | Initial Release |
LP8869-Q1 | LP8869C-Q1 | LP8867-Q1 | LP8867C-Q1 | |
Number of LED channels | 3 | 3 | 4 | 4 |
LED current / channel | 120 mA | 120 mA | 120 mA | 120 mA |
Power Line FET Control and Automatic Current De-rating Support | Yes | No | Yes | No |
PIN | TYPE(1) | DESCRIPTION | |
---|---|---|---|
NO. | NAME | ||
1 | VIN | A | Input power pin and pin for input voltage detection for OVP protection |
2 | LDO | A | Output of internal LDO; connect a 1-μF decoupling capacitor between this pin and noise-free GND. Put the capacitor as close to the chip as possible. |
3 | FSET | A | DC-DC (boost or SEPIC) switching frequency setting resistor; for normal operation, resistor value from 24 kΩ to 219 kΩ must be connected between this pin and ground. |
4 | VDDIO/EN | I | Enable input for the device as well as supply input (VDDIO) for digital pins. |
5 | FAULT | OD | Fault signal output. If unused, the pin may be left floating. |
6 | SYNC | I | Input for synchronizing DC-DC converter. If synchronization is not used, connect this pin to GND to disable spread spectrum or to VDDIO/EN to enable spread spectrum. |
7 | PWM | I | PWM dimming input. |
8 | NC | — | No connect |
9 | GND | G | Ground |
10 | ISET | A | LED current setting resistor; for normal operation, resistor value from 20 kΩ to 129 kΩ must be connected between this pin and ground. |
11 | GND | G | Ground. |
12 | OUT4/GND | A | Current sink output for LP8867C-Q1
This pin must be connected to GND if not used. GND pin for LP8869C-Q1 |
13 | OUT3 | A | Current sink output.
This pin must be connected to GND if not used. |
14 | OUT2 | A | Current sink output.
This pin must be connected to GND if not used. |
15 | OUT1 | A | Current sink output.
This pin must be connected to GND if not used. |
16 | FB | A | DC-DC (boost or SEPIC) feedback input; for normal operation this pin must be connected to the middle of a resistor divider between VOUT and ground using feedback resistor values greater than 5kΩ. |
17 | PGND | G | DC-DC (boost or SEPIC) power ground. |
18 | SW | A | DC-DC (boost or SEPIC) switch pin. |
19 | NC | — | No connect |
20 | VIN | A | Input power pin and pin for input voltage detection for OVP protection |
MIN | MAX | UNIT | ||
---|---|---|---|---|
Voltage on pins | VIN, SD, SW, FB | –0.3 | 50 | V |
OUT1, OUT2, OUT3, OUT4 | –0.3 | 45 | ||
LDO, SYNC, FSET, ISET, PWM, VDDIO/EN, FAULT | –0.3 | 5.5 | ||
Continuous power dissipation(3) | Internally Limited | |||
Ambient temperature, TA(4) | –40 | 125 | °C | |
Junction temperature, TJ(4) | –40 | 150 | °C | |
Storage temperature, Tstg | –65 | 150 | °C |