Topdiode TNSG27511 to replace TI UCC27511

Table of Contents


UCC27511 and UCC27512 single-channel high-speed low-side gate driver devices can effectively drive metal oxide semiconductor field effect transistors (MOSFET) and insulated gate bipolar transistor (IGBT) power switches. The design scheme adopted by UCC27511 and UCC27512 can minimize the breakdown current, thus providing a high peak pull/sink current pulse for capacitive loads, while providing rail-to-rail driving capability and ultra-short propagation delay (typical value is 13ns).


Low-cost gate driver devices provide high-quality alternatives to NPN and PNP discrete solutions.

4A peak pull current and 8A peak sink current are driven asymmetrically.

Strong irrigation current provides enhanced resistance to Miller turn-on effect.

UCC27511 adopts separate output configuration (easy to adjust the turn-on and turn-off speed independently), saving a diode.

Short propagation delay (typical 13ns)

Short rise and fall times (typical values are 9ns and 7ns, respectively)

4.5V to 18V single power supply range

The output remains low during the VDD undervoltage lockout (UVLO) (to ensure no glitch pulse operation during power-on and power-off).

Transistor logic (TTL) and complementary metal oxide semiconductor (CMOS) compatible input logic threshold (independent of supply voltage)

Lagging logic threshold for high immunity

Two-input design (inverting (IN- pin) or non-inverting (IN+ pin) driver configuration can be selected)

Unused input pins can be used to enable or disable functions.

When the input pin is floating, the output remains low.

The absolute maximum voltage level of the input pin is not limited by the bias voltage of the VDD pin.

Operating temperature range from-40 C to 140 C.

6-pin DBV (SOT-23) and 6-pin DRS(3mm x

3mm wafer-level low profile leadless (WSON) package options with exposed thermal pads.


switch mode power supply

DC-DC converter

Accompanying gate driver device for digital power controller

Solar energy, motor control, uninterruptible power supply (UPS)

Gate driver for a new wide band gap power supply device (such as GaN)

Description (continued)

UCC27511 has a unique dual-input design, and the same device can flexibly realize inverting (IN- pin) and non-inverting (IN+ pin) configurations. Both the IN+ pin and the IN- pin can be used to control the state of the driver output. Unused input pins can be used to enable and disable functions. For safety reasons, the internal pull-up and pull-down resistors on the input pin ensure that the output is kept low when the input pin is floating. Therefore, the unused input pins cannot remain in the floating state, but need to be properly biased to ensure that the driver output is enabled for normal operation.

The input pin threshold of UCC27511 device is based on a low-voltage logic circuit compatible with TTL and COMS, which is fixed and independent of the supply voltage of VDD. The wide lag between the high and low thresholds provides excellent immunity.

UCC27511 and UCC27512 provide peak drive current capability of 4A pull current and 8A sink current (asymmetric drive). The strong current injection ability in asymmetric drive improves the ability to resist parasitism and Miller turn-on effect. The UCC27511 device also has a unique split output configuration, in which the gate drive current is pulled out through the OUTH pin and injected through the OUTL pin. This unique pin arrangement enables users to use independent on and off resistors on OUTH and OUTL pins respectively, and can easily control the switching rate.

UCC27511 and UCC27512 have a wide VDD range of 4.5V to 18V and a wide temperature range of–-40°C to 140 c. An internal undervoltage lockout (UVLO) circuit on the VDD pin keeps the output low when the VDD operating range is exceeded. This device can operate at low voltage (for example, less than 5V) and has good switching characteristics in the same kind of products, so it is very suitable for driving new wide-band gap power switching devices such as GaN power semiconductor devices.

TNSG27511 replace UCC27511

In the past two years, due to out-of-stock and price increases and other factors, many manufacturers through domestic replacement to solve the problem of project shortage, domestic motor driver chip in voltage withstand voltage, current drive ability and anti-static, anti-surge reliability has a good performance, Topdiode TNSG27511 double low side, high current drive can be compatible to replace TI UCC27511 chip.

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