Silergy | Automotive OBC+DC/DC Solution

Vehicle OBC

Electric vehicles can be divided into the following categories according to charging methods: hybrid electric vehicles (HEV), plug-in hybrid electric vehicles (PHEV), extended-range hybrid electric vehicles (EREV), battery-powered pure electric vehicles (BEV), and hydrogen fuel cell pure electric vehicles (FCEV). Among them, PHEV, EREV and BEV must all go through the step of external charging, and these vehicles all need an on-board charger (OBC).

OBC can use single-phase or three-phase power and provide up to 22kW of power for the fastest charging. Since all batteries need to be charged using direct current, the core function of the OBC is to rectify the power input and convert it into a charging voltage suitable for the battery.

There are two main power stages in an OBC. First, the PFC stage maintains the phase relationship between the input current and voltage, minimizing the total harmonic distortion (THD) of the line/grid current, improving overall energy efficiency.

The second power stage is a DC/DC converter, which takes the DC output from the PFC stage and converts it to the level required to charge the battery. The output voltage and current of the converter vary over time based on the overall health and state of charge of the battery.

Silergy Automotive OBC+DC/DC Solution

Silergy's automotive OBC+DC/DC solutions can provide high-performance and high-reliability automotive-grade isolation drivers, motor drivers, LED drivers, flyback controllers, multi-channel power management chips, Hall current sensors, current detection amplifiers, DC/DC conversion chips, linear regulators and other solutions.

Isolation Driver

Automotive

SA52800

Dual-Channel Isolated Gate Driver

◆Dual channel isolated gate driver

◆Switch parameters:

♢25ns propagation delay

♢Minimum pulse width 10ns

♢5ns maximum delay matching

♢6ns maximum pulse width distortion

◆4A peak source current, 6A peak sink current output

◆Input voltage: 3-18V

◆Up to 25V output drive power

◆Isolation layer life> 40 years

◆Common mode transient immunity (CMTI) greater than ±150V/ns

◆Internal functional isolation between channels supports working voltage up to ±1850V

◆Safety related certification:

♢ DIN VDE V0884-11:2017-01 standard 8000VPK isolation

♢ UL1577 standard and up to 1 minute 5.7kVRMS isolation

♢ CSA component notice 5A certification

♢ CQC certification of GB4943.1-2011

◆Working temperature: -40-125°C

◆Compact package: SOP14W (8mm creepage and clearance distance)

Motor drive

Automotive

SA52270

15A H-bridge motor driver

◆Input voltage: 4-28V

◆Output current: 15A

◆With anti-straight-through protection

◆Integrated undervoltage lockout, thermal shutdown,

Overvoltage clamp protection, output short circuit protection

◆Low power standby mode

◆PWM working mode

◆Output current detection

◆With fault diagnosis function

◆Compact package: SOP16

◆ AEC-Q100 Grade 1 Certification

LED Driver

Automotive

SA32707

3-Channel Linear LED Driver with ON OFF Dimming

◆Wide input voltage: 5-28V

◆Current accuracy over the full temperature range:

♢IOUTx>30mA, current accuracy of each device is ±3.5%

♢IOUTx>30mA, current accuracy of each channel is ±1.5%

◆Low pressure difference:

♢Maximum voltage drop: 240mV@60mA 25℃

♢Maximum voltage drop: 660mV@150mA 25℃

◆Temperature feedback current regulation function

◆Using multiple ICs or parallel output of multiple channels of a single IC can provide higher current

◆With delayed shielding LED short circuit protection

◆Single LED short circuit protection with delay shielding

◆With delay shielding LED open circuit protection

◆Independent single LED short circuit fault pin and open/short circuit fault pin

◆ AEC-Q100 Grade 1

◆Working temperature: -40-125°C

◆Compact package: TSSOP16E

Multi-channel power management

Automotive

SA47301

Automotive Multi-Channel Power Management Chip

◆ Input voltage: 3-40V (6-40V when not using boost regulator)

◆Internally integrated boost, buck regulator, microprocessor, CAN, high-precision voltage reference power supply, voltage follower LDO, standby LDO

◆Configurable question-and-answer and window watchdog

◆Provide frequency synchronization signal and voltage monitoring function for external power supply module.

◆Independent internal voltage monitoring module

◆Independent output reset and interrupt signals

◆Two safe status outputs with programmable delay time

◆Functional safety complies with ISO26262 ASIL-D

◆16-bit SPI communication interface

◆Input overvoltage protection

◆Long time timer (LDT)

◆Microprocessor error signal monitoring

◆Support multiple wake-up sources

◆Wettable flank package: QFN7x7-48

Hall Current Sensor

Automotive

SYCT Series

Hall open loop current sensor chip

◆ Hall open loop current sensor

◆Single power supply 3.3V or 5V

◆Support single/bidirectional output

◆Analog signal output

◆Primary side measurement current: ±50A~±400A

◆Working temperature: -40~+125°C

150A: -40~+105°C

200/250/400A: -40~+85°C

◆Good accuracy, linearity and temperature drift

◆Low internal resistance can effectively control heat and power consumption

SYCK-BS Series

Hall open loop current sensor module

◆Rated measuring current: 50-600A

◆Measurement range: 150-900A

◆High precision

◆Low temperature drift

◆Strong anti-interference

◆ Applied to static converters in AC transmissions, DC motors and various power supplies

Current Sensing

Automotive

SA59101/2

Precision Current Sense Amplifier

◆ Wide common mode voltage range: -0.3-26V

◆ Gain: ♢SA59101: 50V/V

♢SA59102: 100V/V

◆ Offset voltage (maximum):

♢SA59101: ±100μV

♢SA59102: ±50μV

◆ Shunt pressure drop range:

♢SA59101: -40-40mV

♢SA59102: -20-20mV

◆ Accuracy:

♢ Maximum gain error of ±0.5%

♢ 0.5μV/℃ offset drift (maximum)

◆ Maximum quiescent current: 100μA

◆ AEC-Q100 Grade 1 Certification

◆ Compact package: SOT363

SA59131

Precision Current Sense Amplifier with PWM Rejection

◆ Enhanced PWM suppression

◆Excellent common mode rejection ratio:

♢DC common mode rejection ratio 132dB

♢AC common mode rejection ratio 84dB@50kHz

◆Wide common mode voltage range: -4V-80V

◆Accuracy:

♢Gain error: 0.05% (Typ)

♢Gain drift: 0.5ppm/℃ (Typ)

♢Offset voltage: ±5μV (Typ)

♢Offset drift: 50nV/℃ (Typ)

◆Fixed gain: 50V/V

◆Quiescent current: 1.8mA (Typ.)

◆Compact package: TSSOP8

DC/DC

Automotive

SA32703

Boost/Flyback Controllers

◆Input voltage: 5~11V

◆REF and FB reference accuracy: ±2%

◆150μA startup current and 800μA operating supply current (excluding MOS drive current)

◆Switching frequency up to 1MHz and minimum off time can be set by FS

◆ISEN cycle-by-cycle current limit 1V

◆Overcurrent limit 1.5V

◆Built-in 4ms soft start time

◆Integrated undervoltage lockout, overcurrent and overtemperature protection

◆ AEC-Q100 Grade 1 Certification

◆Working temperature: -40-125°C

◆Compact package: SO8

SA22300

36V Boost/Flyback Controller

◆Wide input voltage range: 3.4-36V

◆1.2V ±2% reference voltage

◆Fixed frequency operation

◆Internal soft start

◆2μA shutdown current

◆Cycle-by-cycle current limiting protection

◆Overcurrent/short circuit/thermal shutdown protection

◆ AEC-Q100 Grade 1 Certification

◆Working temperature: -40-125°C

◆Compact package: SOP8

SA22301

36V Boost/Flyback/SEPIC Controller

◆Wide input voltage: 4.75-36V

◆Programmable switching frequency: 100-1000kHz

◆2.5V ±2% reference voltage

◆2μA shutdown current

◆External soft start can be adjusted by capacitor

◆Cycle-by-cycle current limiting protection

◆Overcurrent protection

◆1A peak gate source current

◆1.3A peak gate sink current

Thermal shutdown

◆ AEC-Q100 Grade 1 Certification

◆Working temperature: -40-125°C

◆Compact package: SSOP14E

SA23002A

2A Single Synchronous Step-Down Converter

◆Input voltage: 2.8-5.5V

◆Output voltage accuracy is ±1.5%

◆100% duty cycle, achieving ultra-low voltage drop

◆1μA typical shutdown current

◆Fixed 2.35MHz switching frequency

◆PWM/PFM operation mode adjustable

◆Current limiting/short circuit/overheat protection

◆ AEC-Q100 Grade 1 Certification

◆Working temperature: -40-125°C

◆ Compact package: DFN2x2-8

SA23006

6A Single Synchronous Step-Down Converter

◆ Input voltage: 2.8-5.5V

±1.5% reference accuracy externally adjustable voltage

◆100% duty cycle, achieving ultra-low voltage drop

◆32μA typical shutdown current

◆Adjustable switching frequency: 1.8-4MHz

◆PWM/PFM operation mode adjustable

◆Adjustable soft start

◆Optional jitter frequency

◆Power normal indication

◆ AEC-Q100 Grade 1 Certification

◆Working temperature: -40-125°C

◆Compact package: QFN2x3-9

LDO

Automotive

SA21345A

300mA Low Dropout Linear Regulator

◆ Wide input voltage range: 4- 36V

◆Low dropout voltage (300mV@300mA)

◆Ultra-low quiescent current

◆Extremely low shutdown current

◆External tantalum or ceramic capacitor

◆Excellent load/line regulation

◆Maximum load current 300mA

◆Enable control input

◆Overcurrent/thermal shutdown protection

◆ AEC-Q100 Grade 1 Certification

◆Compact package: SO8E

SA21345G

150mA Low Dropout Linear Regulator

◆Wide input voltage range: 4V ~ 36V

◆Low dropout voltage (150mV@150mA)

◆Ultra-low quiescent current

◆Fixed 5V output, no external voltage divider resistor required

◆External tantalum or ceramic capacitor