onsemi NCV7705/NCV7706 Mirror-Module Driver ICs

onsemi NCV7705/NCV7706 Mirror-Module Driver Integrated Circuits (ICs) are powerful driver ICs for automotive body control systems. The onsemi IC is designed to control several loads in the front door of a vehicle. The monolithic IC is able to control mirror functions like mirror positioning, heating, and folding. The device features four high-side outputs to drive LEDs or incandescent bulbs (up to 5/10W). To allow maximum flexibility, all lighting outputs can be Pulse Width Modulation (PWM) controlled through PWM inputs (external signal source) or by an internal programmable PWM generator unit. The NCV7705/NCV7706 ICs are controlled through a 24-bit SPI interface with in-frame response.

Features

5.5V to 28V operating range
4x high-side and 4x low-side drivers connected as half-bridges
- 2x half-bridges I_load = 0.75A; R_DS(on) = 1.6Ω at +25°C
- 2x half-bridges I_load = 3A; R_DS(on) = 300mΩ at +25°C
4x high-side lamp drivers
- 2x LED; I_load = 0.3A; R_DS(on) = 1.4Ω at +25°C
- 1x 10W; configurable as LED driver; I_load = 2.5A; R_DS(on) = 300mΩ at +25°C
- 1x 5W; configurable as LED driver; I_load = 1.25A; R_DS(on) = 600mΩ at +25°C
1x high-side driver for mirror heating; I_load = 6A; R_DS(on) = 100mΩ at +25°C
Electrochromic mirror control (NCV7706 only)
- 1x 6-bit selectable output voltage controller
- 1x LS for EC control; I_load = 0.75A; R_DS(on) = 1.6Ω at +25°C
Independent PWM functionality for all outputs
Integrated programmable PWM generator unit for all lamp driver outputs - 7-bit/10-bit selectable duty-cycle setting precision

Programmable soft-start function to drive loads with higher inrush currents as the current limitation value
Multiplex current sense analog output for advanced load monitoring
Very low current consumption in standby mode
Charge pump output to control an external reverse polarity protection MOSFET
24-bit SPI interface for output control and diagnostics
Protection against short-circuit, overvoltage, and over-temperature
Downwards pin-to-pin and SPI registers compatible with NCV7707
Moisture Sensitivity Level (MSL) 3
AEC-Q100 qualified and PPAP compliant
SSOP36-EP power package
Lead-free device

Applications

Decentralized door electronic systems
Body Control Units (BCUs)

Specifications

Supply voltages
- 5.5V to 28V functional
- 8V to 18V parameter specification
Supply currents
- VS
  - 12µA maximum in standby mode, 3.5µA typical
  - 20mA maximum in active mode, 8mA typical
- V_CC
  - 6µA maximum in standby mode, 4.5µA typical
  - 8mA maximum in active mode, 6.5mA typical
- 18µA maximum total standby mode supply current, 8µA typical
22µs maximum cross-conduction protection time
Recovery frequency
- 1kHz to 4kHz in slow recovery mode
- 2kHz to 6kHz in fast recovery mode
Bulb/LED driver output
- 1mA maximum leakage current
- 0.22V/µs typical slew rate

1.25A ECFB output current
Electrostatic Discharge (ESD) ratings
- Human-Body Model (HBM)
  - ±2kV maximum on all pins
  - ±4k± maximum for output pins OUT1 to OUT4 and ECFB to GND (all unzapped pins grounded)
- Charged Device Model (CDM)
  - ±500V maximum on all pins
  - ±750V on the corner pins
Junction-to-air thermal resistance
- 49.4°C/W for SSOP36-EP, 1-layer PCB
- 24°C/W for SSOP36-EP, 4-layer PCB
-40°C to +150°C operating junction temperature range