Automotive Applications

FEATURES

• High Efficiency Synchronous Buck Converter with integrated MOSFETs
• Supports 1 or 2 strings of LEDs up to 5A peak current with user-define current setting
• Fast transient response
• Optional Spread Spectrum frequency operation
• Individual LED open/short detect and protection
• No external compensation components
• Over-current protection
• Over-temperature protection
• Fault Status output
• Low standby current

GENERAL DESCRIPTION

OZ585 is a high performance LED driver IC optimized for automotive IR LED applications.

OZ585 is designed for a Buck converter application providing current regulation to a single-string LEDs (1 to 3 LEDs connected in series,) or 2-string LEDs(1 to 2 LEDs in a string.) The LED current can be up to 5A. It is designed to receive a low-frequency, low duty cycle PWM signal which in turn, drives the LEDs with fast turn-on response when receiving the PWM signal.

In applications, each LED is monitored with operational status. Abnormal situations such as open-LED or short-LED will be detected and reported. It provides complete protection functions to a high-reliable system operation in automotive applications. Status indicators are provided for different fault conditions if occurred.

FEATURES

• Pre-Boost Converter
  1. - 4.5V to 36V Input Voltage Range
  2. - Asynchronous Boost Converter
  3. - Integrated N-channel power MOSFET
  4. - Power Limit or Current Limit regulation function
  5. - Pre-charge and Soft start function to avoid possible inrush input current during start up
• Buck IR-LED/VCSEL driver
  1. - High Efficiency Synchronous Buck Converter
  2. - Integrated power MOSFETs
  3. - Supports 1 or 2 strings of LEDs application
  4. - Drive up to 5A current with user-define setting
• EMI Mitigation functions
  1. - Soft start/stop of LED current during DPWM on/off
  2. - Slew rate control of Boost/Buck Converter
  3. - Optional Spread Spectrum frequency operation
• Comprehensive Protection Features
  1. - VIN Under / Over Voltage Lockout protection
  2. - Over Voltage protection for Boost output
  3. - Under Voltage Lockout protection for Buck input
  4. - Over Current protection for Boost / Buck
  5. - LED short protection with flexible detection level
  6. - LED open protection
  7. - External MOSFET D-S short protection for 2 strings of LEDs application (alternatively)
  8. - DPWM pulse width limitation
  9. - Buck input short-to-GND protection
  10. - Over Temperature protection
  11. - ISEN Under Voltage protection
  12. - Voltage-Monitoring circuitry for main bandgap reference with independent bandgap
  13. - Missing-Clock Monitor for Internal Oscillator
  14. - Self-diagnosis of protection functions
  15. - Fault Status output
• Automotive Quality
  1. - -40ºC to +125ºC Operating Temperature Range
  2. - AEC-Q100 and ASIL-B

GENERAL DESCRIPTION

TURNER2 is a high-performance LED driver IC optimized for automotive IR LED/VCSEL applications. It includes an Asynchronous Boost converter and a synchronous Buck converter for LED driver.

The asynchronous Boost converter converts the battery voltage to a voltage for the Buck regulator (LED driver.) It provides current regulation to limit the input/output power or input/output current while providing a regulated voltage at its output.

The synchronous Buck converter provides current regulation to a single-string LEDs or 2-string LEDs. The LED current can be up to 5A. It is designed to receive a low-frequency DPWM (digital pulse width modulator) signal with low duty cycle which in turn drives the LEDs with fast turn-on response. APWM (analog pulse width modulator) signal can also be applied to the controller to adjust the LED current during the DPWM-on period.

In applications, LEDs are monitored with their operational status. Abnormal situations such as open-LED or short-LED are detected and reported. TURNER2 provides complete protection functions to a high-reliable system operation in automotive applications.

FEATURES

• 72-channel with constant-current-sink outputs up to 20mA per channel
• Provides up to 80mA per channel with reduced number of channels enabled
• Provides adaptive DC/DC output voltage control for DC/DC converter
• High speed Serial Peripheral Interface (SPI)
1. 3 bits for Maximum Current control with 10mA to 80mA range
2. 7 bits global Analog Dimming control
3. LED over current and short circuit protection
4. 7 bits Dot Correction control with a 24% to 100% range for each of the 72 channels
5. 14 bits resolution for PWM dimming width control for each of the 72 channels
6. 7 bits digital resolution for PWM dimming delay control for each of the 72 channels
7. Supports multiple-IC operation with daisy chain connection
8. Broadcast address available for both broad-cast WRITE and READ functions
9. Individual channel abnormal/protection report
• Bypass VSYNC, ENA, CSB, SCLK signal to simplify PCB layout
• VSYNC interface for dimming frequency synchronization and SPI data update
• Internal PLL for internal clock(Fop) generation from VSYNC signal
• Protections and status report
1. LED over current and short circuit protection
2. Open-LED Protection
3. DRN short to GND monitor
4. Over-temperature protection
5. Over-temperature alert
• Automotive Quality
1. AEC-Q100 Grade1
2. Support functional safety system design

GENERAL DESCRIPTION

OZ590 includes a 72-channel, constant-current sink LED driver controller and a feedback interface to DC/DC converter. The controller provides a 14-bit resolution of pulse width modulation (PWM) dimming control, a 7-bit PWM dimming delay, and a 7-bit dot correction(DC) which adjusts brightness deviations among all channels by adjusting each channel individually. IC also provides a 7-bit analog dimming control which globally adjusts output current level, i.e. for all channels. A 3-bit maximum current control allows users to set the maximum output current level for all channels; It provides eight(8) options of maximum output current ranging from 10mA with a step of 10mA, to 80mA. In applications, the number of enabled channels and PWM width setting of each channel will be affecting the thermal performance of the controller. The feedback control receives LED current operation status and feeds control signal to the system DC/DC converter. This is particularly useful for optimally adjusting the DC/DC converter output voltage for the LEDs when multiple ICs are used in a system. This unique feature provides an improvement of efficiency in system performance. OZ590 provides a full protection package.

FEATURES

• Fixed 3.3V or 5.0V output accuracy: ± 1% Accuracy
• Output Current Range: ≤ 150mA
• Wide operating voltage range: 5.5 to 40 V
• Wide operating temperature range: -40 to 105°C
• Protection:
  • Short circuit protection
  • Thermal Shutdown (Die Over-Temperature)
  • Under Voltage Lockout (UVLO)
• Fast Transient Response
• Power-Good Output - Open Drain
• Low Power Consumption
• Typical Quiescent Current: 16 μA (typ.)
• Typical Shutdown mode: 2.0 μA (typ.)
• IC Package: E-SOP8, E-MSOP8

GENERAL DESCRIPTION

OZ9211Q is a high voltage Low Dropout (LDO) Voltage Regulator with only 16μA (typ.) low power consumption at no load. It is suitable for power supplies for microprocessor for automotive, portable device.

OZ9211Q provides an open-drain PG (Power Good) output signal, indicating that the output is within the normal range. To prevent IC output circuit damage OZ9211Q provides short-circuit protection to ensure safe operation during load fault conditions. Similarly, an Under Voltage condition may result in incorrect IC operation, possibly including the output voltage dropping below 5.0V. OZ9211Q protects itself and the load circuits by shutting down using Under Voltage Lockout protection circuitry.

OZ9211Q provides fast transient response with excellent line and load transient performance.

SIMPLIFIED APPLICATION DIAGEAM

FEATURES

• Fixed 3.3V or 5.0V Output Accuracy: ± 1%
• Adjustable Output Range: 1.8V to 18V (only for ADJ Version) with accuracy: ± 1%
• Output Current Range: ≤ 500mA
• Wide Operating Voltage Range: 3.6 to 40 V
• Wide Operating Temperature Range: -40 to 125°C
• Protection:
  • Short Circuit Protection
  • Thermal Shutdown (Die Over-Temperature)
  • Under Voltage Lockout (UVLO)
• Fast Transient Response
• Low Power Consumption
  • Typical Quiescent Current: 16 μA (typ.)
  • Typical Shutdown Mode: 2.0 μA (typ.)
• IC Package:

TO252-3, TO263-3, SOT89-3 (OZ9213Q) / TO252-5, TO263-5, SOT89-5 (OZ9214Q)

GENERAL DESCRIPTION

OZ9213Q/OZ9214Q is a high voltage Low Dropout (LDO) Voltage Regulator with only 16μA (typ.) low power consumption at no load. It is suitable for power supplies for microprocessor for automotive, portable device.

To prevent IC output circuit damage, OZ9213Q/OZ9214Q provides short-circuit protection to ensure safe operation during load fault conditions. Similarly, an Under Voltage condition may result in incorrect IC operation, possibly including the output voltage dropping below 3.6V. OZ9213Q/OZ9214Q protects itself and the load circuits by shutting down using Under Voltage Lockout protection circuitry.

OZ9213Q/OZ9214Q provides fast transient response with excellent line and load transient performance.

SIMPLIFIED APPLICATION DIAGEAM

(OZ9213Q:Fixed Output)

(OZ9214Q: Fixed O utput)

(OZ9214Q: A djustable O utput)