Some of the features of the LP3943 device are:
- 16 low-side switches to control the current in 16
strings of LEDs with a maximum of 25mA per switch or a maximum of 200mA
total.
- Programmable internal PWM dimming:
- Duty cycle control (8 bits). Any of the 16 current switches can be mapped to either PWM0 register or PWM1 register. Each register offers 8-bit PWM duty cycle control.
- PWM Frequency control (8 bits). Any of the 16
current switches can be mapped to either PSC0 register or PSC1
register. Each register offers 8-bit PWM frequency control from
0.625Hz to 160Hz.
- RESET input.
- Auto increment for I2C writes to reduce number of I2C clock pulses .
- The LP3943 provides for an externally selectable I2C slave address via the ADR0, ADR1, and ADR2 inputs. See Figure 6-3.