Features and benefits

• 24 LED drivers. Each output programmable at:

– Off

– On

– 8 bits programmable LED brightness

– 8 bits programmable group dimming/blinking mixed with individual LED brightness

– Programmable LED output delay to reduce EMI and surge currents

• Gradation control for all channels

– Each channel can be assigned to one of six gradation control groups

– Programmable gradation time and rate for ramp-up and/or ramp-down operations

– Programmable step time (6-bit) from 0.5 ms (minimum) to 512 ms (maximum)

– Programmable hold-on time after ramp-up and hold-off time after ramp-down (3-bit) from 0 s to 6 s

– Programmable final ramp-up and hold-on current

– Programmable brightness current output adjustment, either linear or exponential curve

• 24 constant current output channels can sink up to 63 mA, and tolerate up to 5.5 V when OFF

• Output current adjusted through an external resistor (REXT input)

• Output current accuracy

– ± 7.5 % absolute accuracy with 60 mA output current

– ± 9 % absolute accuracy with 30 mA output current

– Maximum ±5 % channel to channel variation

– Maximum ±7 % device to device variation

• Open/short load/overtemperature detection mode to detect individual LED errors

• 4-wire serial bus interface with 10 MHz data clock rate

• 256-step (8-bit) linear programmable brightness per LED output varying from fully off (default) to maximum

brightness fully ON using a 31.25 kHz PWM signal

• 256-step group brightness control allows general dimming (using a 122 Hz PWM signal) from fully off to

maximum brightness (default)

• 256-step group blinking with frequency programmable from 15 Hz to 16.8 s and duty cycle from 0 % to 99.6 %

• Active LOW Output Enable (OE) input pin allows for hardware blinking and dimming of the LEDs

• 8 MHz internal oscillator requires no external components

• Internal power-on reset

• No glitch on LEDn outputs on power-up

• Low standby current

• Operating power supply voltage (VDD) range of 2.7 V to 5.5 V

• 5.5 V tolerant inputs on non-LED pins

• -40 °C to +85 °C operation for PCA9958HN; -40 °C to +125 °C operation for PCA9958HN/Q900

• Latch-up performance exceeds 100 mA per JESD 78, Class II

• ESD protection exceeds per JESD22

– 2 kV Human-Body Model ((JS-001-2023) – Class 2)

– 750 V Charged-Device Model ((JS-002-2022) – Class C2b)

• Available in HVQFN40 wettable flanks package

• PCA9958HN/Q900 for automotive (AEC-Q100 compliant)

Applications

• RGB or RGBA LED drivers

• LED status information

• LED displays

• LCD backlights

• Keypad backlights for cellular phones or handheld devices

• Fade-in and fade-out for breathlight control