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 fast 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 | Fast detection response of 10µs max. Undervoltage Detection. Built-in SENSE Pin reverse connection protection circuit. Low current consumption of 2.0µA. |
| Battery Monitoring IC (Voltage detector) | S-19115 | Overvoltage Detection. Built-in SENSE Pin reverse connection protection circuit. Low current consumption of 0.6µA. |
| Battery Monitoring IC (Voltage detector) | S-19116 | Fast detection response of 6.8µs max. Overvoltage Detection. Built-in SENSE Pin reverse connection protection circuit. Low current consumption of 2.0µA. |
| 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 fast 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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Battery Monitoring IC S-19116 series
Ultra fast detection
Low current consumption
Low Current Consumption Battery Monitoring IC with Industry's Fastest Detection Response
The S-19116 Series exhibits the industry's fastest voltage detection response time of 6.8µs max. and low current consumption of 2.0µA typ. Improves safety and lower current consumption of automotive devices.
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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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