Overview
The LM5113SDX/NOPB, produced by Texas Instruments, is a 5A, 100V half-bridge gate driver designed to drive both the high-side and low-side enhancement mode Gallium Nitride (GaN) FETs. This device is particularly suited for synchronous buck or half-bridge configurations. The LM5113 features a floating high-side driver capable of operating up to 100V, utilizing a bootstrap technique for bias voltage generation, which is internally clamped at 5.2V to prevent exceeding the maximum gate-source voltage rating of the GaN FETs. The inputs are TTL logic compatible and can withstand input voltages up to 14V, regardless of the VDD voltage. This driver is available in WSON-10 and 12-bump DSBGA packages, offering compact footprints and minimized package inductance.
Key Specifications
| Parameter | Value |
|---|---|
| Peak Source/Sink Current | 1.2A / 5A |
| High-Side Floating Bias Voltage Rail | Up to 100VDC |
| Internal Bootstrap Supply Voltage Clamping | 5.2V |
| Pull-down/Pull-up Resistance | 0.6Ω / 2.1Ω |
| Propagation Times | 28ns Typical |
| Propagation Delay Matching | 1.5ns Typical |
| Supply Rail Under-Voltage Lockout | Yes |
| Operating Temperature | -40°C to 125°C |
| Package Options | WSON-10 (4 mm x 4 mm), 12-bump DSBGA (2 mm x 2 mm) |
Key Features
- Independent high-side and low-side TTL logic inputs
- Split gate outputs for adjustable turn-on/turn-off strength
- Fast propagation times and excellent propagation delay matching
- Internal bootstrap supply voltage clamping to prevent gate voltage exceeding maximum ratings
- Strong sink capability to maintain the gate in the low state during switching
- Low power consumption
- Compact package options including WSON-10 and DSBGA
Applications
- Current Fed Push-Pull converters
- Half and Full-Bridge converters
- Synchronous Buck converters
- Two-switch Forward converters
- Forward with Active Clamp converters
Q & A
- What is the LM5113SDX/NOPB used for?
The LM5113SDX/NOPB is used to drive high-side and low-side enhancement mode Gallium Nitride (GaN) FETs in synchronous buck or half-bridge configurations.
- What is the peak source/sink current of the LM5113SDX/NOPB?
The peak source/sink current is 1.2A / 5A.
- What is the maximum operating voltage for the high-side bias voltage rail?
The high-side bias voltage rail operates up to 100VDC.
- How is the bootstrap supply voltage clamped in the LM5113SDX/NOPB?
The bootstrap supply voltage is internally clamped at 5.2V.
- What are the package options for the LM5113SDX/NOPB?
The device is available in WSON-10 (4 mm x 4 mm) and 12-bump DSBGA (2 mm x 2 mm) packages.
- What is the operating temperature range for the LM5113SDX/NOPB?
The operating temperature range is -40°C to 125°C.
- Can the LM5113SDX/NOPB handle high input voltages?
Yes, the inputs can withstand voltages up to 14V regardless of the VDD voltage.
- What is the purpose of the split gate outputs in the LM5113SDX/NOPB?
The split gate outputs allow for adjustable turn-on and turn-off strength independently.
- Does the LM5113SDX/NOPB have any protection features?
Yes, it includes supply rail under-voltage lockout and strong sink capability to prevent unintended turn-on during switching.
- What types of converters can the LM5113SDX/NOPB be used in?
The LM5113SDX/NOPB can be used in current fed push-pull, half and full-bridge, synchronous buck, two-switch forward, and forward with active clamp converters.
