Table of Contents
ICs ideal for DC/DC Converters
Overview
EV, PHEV and HEV vehicles are equipped with two types of batteries: a high-voltage battery for drive and a 12V auxiliary battery. The DC/DC converter converts 200 to 800V from the high-voltage battery to 12V low voltage. This lower voltage powers the head lamps, windshield wipers, instrument cluster, ECUs and charges the auxiliary 12V battery.
The DC/DC converter uses low on-resistance Si IGBTs or SiC MOSFETs to reduce conversion loss. The on-resistance has the characteristic to drop as the gate voltage rises so it is recommended to design a gate drive circuit using, for example, an Si IGBT with a high voltage of around 15V or an SiC MOSFET with a high voltage of around 18V.
ABLIC has a lineup of LDOs that can output the high voltage required by the gate driver circuit. In addition, our lineup offers LDOs with built-in watchdog timers for monitoring MCUs, battery monitoring ICs used for high-speed monitoring of abnormal voltages in 12V auxiliary batteries and operational amplifiers ideal for charge current monitoring. With its wide range of products, ABLIC can provide ICs ideal for DC/ DC converters.
ICs ideal for DC/DC Converters
Block Circuit
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*VD: Voltage detector (Reset IC) *LDO: Low-dropout regulator *WDT: Watchdog timer
ICs ideal for DC/DC Converters
ICs ideal for DC/DC Converters
| Product | Recommended product | Applications and Features |
|---|---|---|
| LDO Regulator (Linear Regulator) | S-19213/4 | For use in SiC MOSFET or Si IGBT gate driver circuits. The output voltage can be adjusted between 1.8 to 30V using an external resistor. |
| LDO Regulator (Linear Regulator) | S-19212 | For use in Si IGBT gate driver circuits. The output voltage can be set between 2.5 to 16V. |
| Battery Monitoring IC (Voltage detector) | S-19114 | Industry's fastest detection response time of 10µs max. Built-in SENSE Pin reverse connection protection circuit. Low current consumption of 2.0µA. |
| Battery Monitoring IC (Voltage detector) | S-19115 | Provides overvoltage monitoring. Built-in SENSE Pin reverse connection protection circuit. Current consumption of 0.6µA. |
| Watchdog Timer | S-1951x | With reset and LDO regulator functions. Current consumption of 3.0µA. |
| Operational amplifier | S-19630A | High-accuracy current detection. 36V operation, Rail-to-Rail input/output, low offset voltage of 50μV. |
Features
LDO Regulator S-19213/4 series
High output voltage
Ultra-low current consumption
An LDO regulator capable of outputting the high voltage required by a gate driver circuit
This is an LDO regulator with a 36V input, 1.8 to 30V output, 500mA/1000mA output, an ultra-low current consumption of 5.0μA (typ.) and a high-power dissipation of 5.21W. This makes it ideal for the around 15 to 18V high-voltage gate driver circuits needed by SiIGBTs or SiC MOSFETs.
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Battery Monitoring IC S-19114 series
Ultra-high speed detection
Low current consumption
Low Current Consumption Battery Monitoring IC with Industry's Fastest Detection Response
The S-19114 Series exhibits the industry's fastest voltage detection response time of 10µs max. and low current consumption of 2.0µA typ. Improves safety and lower current consumption of automotive devices.
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Battery Monitoring IC S-19115 series
Ultra-low current consumption
Ultra-compact package
High-reliability Voltage Monitoring for Functional Safety
A battery monitoring IC that detects 36V input, overvoltage with high accuracy. The wide rated voltage from -30 to 45V of the monitoring connection (SENSE) pin enables input of high voltage as well as negative voltage.
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Watchdog Timer S-1951x series
Ultra-low current consumption
Single chip IC for Supplying MCU Power, Monitoring Voltage and Operation
This is a window watchdog timer IC with a 36V input, 250mA/500mA output and comes with reset and LDO regulator functions. Current consumption during operation is a mere 3.0uA, which helps reducing standby current. We are sure you will find a product tailored to your needs in our extensive lineup.
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High-accuracy Operational Amplifier S-19630A
Low offset voltage
36V operation
Contributing to High-Accuracy Current Sensors
A wide operating voltage range allows use of this IC in systems from 5V to high-voltage systems directly connected to battery. Low offset voltage enables high-accuracy current detection. Input Rail-to-Rail enables low-side and high-side current detection.
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Series name
Operating voltage range: 4.0 V to 36 V
Low offset voltage: 50μV max.
Rail-to-Rail input and output
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