| Picture | Part Number | Manufacturer | Stock | Action |
|---|---|---|---|---|
 | UCC27524ADR | Texas Instruments | 2,220 | |
| UCC27524ADRG4 | Texas Instruments | 6,180 | |
| UCC27624DR | Texas Instruments | 4,930 | |
| UCC27444DR | Texas Instruments | 2,350 |
For paralleled gate-driver outputs, join INA and INB close to the package and drive ENA and ENB from one shared dual-channel enable control net. This keeps normal PWM and fault commands aligned across both output stages.
A slow edge amplifies the timing difference between the two input thresholds. One output can then source current while the other still sinks it. Check the slope where the inputs meet. TI recommends at least 20 V/µs for directly joined outputs. Its 4 ns maximum for SOIC-8 gate-driver delay matching applies under the specified switching test conditions.
No. With the device operating, a low enable holds that channel’s output low regardless of its PWM input. An enabled channel can oppose it if both output pins share a node and the enabled channel receives a high command.
By Alice Chen
UCC27524ADR is a Texas Instruments dual 5 A low-side gate driver in SOIC-8 that supports paralleled gate-driver outputs. Tie the PWM inputs close to the package and use a common enable command. For directly joined outputs, TI recommends at least 20 V/µs at the inputs to reduce the effect of threshold mismatch. Check gate-driver delay matching and output waveforms on the intended board.
UCC27524ADR is the D-package SOIC-8 orderable of TI’s UCC27524A dual noninverting low-side driver. Its two outputs can serve separate loads, or they can be combined as one drive node. The choice changes how to use the controls. Independent commands make sense with independent outputs. After the outputs are joined, each channel has to follow the same PWM and enable command.
No. The 5 A rating describes brief gate-drive pulses. Peak output current depends on the circuit, and the operating limit for repetitive pulses depends on heat dissipation as well as the bias supply, gate load and output paths.
Specify the full TI ordering code, SOIC-8 package, reel quantity and delivery date. For an alternate, add the bias range, gate load, PWM edge and shared-enable arrangement. Ask engineering to check the candidate’s package-specific timing and fault behavior against those requirements.
The risk is clearest during a fault shutdown. A low enable holds the corresponding output low, so disabling one channel does not disconnect it from the joined node. If the other channel stays enabled with PWM high, one stage pulls toward VDD while the other pulls toward ground. Both enable inputs have internal pullups. Leaving one floating while sending a shutdown command to the other therefore defeats the intended dual-channel enable control. See the UCC27524A datasheet, §§6.2–6.5.
Table 1: Connections for one shared gate node | Source: TI UCC27524A datasheet, §§4, 6.3.3, 6.4 | Compiled by: YG GROUP
| Pins | Connection to review | Failure to prevent |
|---|---|---|
| INA (2), INB (4) | One PWM net, joined near the input pins | Independent commands or unequal paths into the two inputs |
| ENA (1), ENB (8) | One enable net driven by the same control | One channel pulling low while the other is commanded high |
| OUTA (7), OUTB (5) | One gate drive node; consider separate series resistor footprints before the join | Excess current between the two output stages during transitions |
| VDD (6), GND (3) | Local bypass and a short gate-current return | Bias droop, ground movement and ringing at the driver |
If each output instead feeds the gate of a different power MOSFET through its own path, the outputs are still separate, even when the power devices switch the same load. TI discusses that arrangement as another use of matched timing. Draw both gate paths on the schematic so the review distinguishes separate gate resistors from two output stages tied to a single node.
Figure 1: Conceptual shared gate-node wiring for UCC27524ADR, with common PWM and enable nets and optional output resistors before the join. | Source: TI UCC27524A datasheet, §§4, 6.3.3 and 6.4 | Chart: YG GROUP
Two inputs on the same net can cross their switching thresholds at different times. As an illustration, a 0.1 V threshold difference produces a 50 ns difference in crossing time on a 2 V/µs ramp, compared with 5 ns at 20 V/µs. These figures show the effect of slope; they are not measurements or specifications for the device. When the outputs are tied, that time difference can put the two stages in opposite states briefly and send current between them.
For paralleled gate-driver outputs with a direct connection, TI recommends a fast input slope of at least 20 V/µs, a close join at the input pins and the option to fit series resistance at each output. An RC filter or a weak logic source can slow the PWM edge at the device even if the controller pin looks clean. Check the slope near the switching thresholds, including the ground reference at the driver. If the gate transition itself needs slowing, adjust the gate path and verify the resulting waveform rather than deliberately stretching the PWM edge. The mechanism and resistor option are illustrated in §6.4 and Figure 6-2.
Gate-driver delay matching is a separate specification. The Rev. C switching table for package D gives 1 ns typical and 4 ns maximum with INA = INB, measured at the 50% output transition points under the stated conditions. The 2 ns maximum listed for DGN does not apply to the SOIC orderable. Neither specification accounts for the full set of PCB, edge-rate and load conditions in your system. For validation, check turn-on, turn-off, assertion of the common disable with PWM high, and power-up and power-down around undervoltage lockout. Compare the driver bias and output waveforms with the intended gate load in place.
TI specifies a 4.5–18 V recommended bias range and a 20 V absolute maximum for UCC27524A. The 5 A figure for each channel describes brief source or sink pulses; doubling the drive stages does not create a 10 A continuous output or guarantee a 10 A pulse on the board. The gate circuit and local bypass influence pulse current, and package dissipation still constrains repetitive operation. Near the lower end of the bias range, allow for the D-package startup threshold, which can be as high as 4.65 V over the stated temperature range, and check supply ripple. See §§5.1, 5.3–5.6 and 8.
Table 2: TI SOIC-8 gate drivers to evaluate | Source: UCC27624DR, UCC27444DR | Compiled by: YG GROUP
| Candidate | When to evaluate it | What still needs review |
|---|---|---|
| UCC27624DR | Dual 5 A peak driver when the design needs more bias headroom or input undershoot tolerance | Recommended bias and input limits, UVLO, enable behavior and parallel timing |
| UCC27444DR | Dual 4 A peak driver when a lower drive strength may meet the gate transition target | Gate rise and fall times, switching loss, pin behavior and load validation |
For a Texas Instruments gate-driver quote, send the full UCC27524ADR code, SOIC-8 package, reel needs, quantity and date in a YG GROUP RFQ. Include the driver bias, logic levels, gate load or MOSFET part number, whether the output pins are joined, and how PWM and shutdown are wired. If an alternate is acceptable, identify which voltage, timing and fault requirements must be met before it can be approved. For related low-side and isolated gate-driver design checks, compare our notes on dual gate-driver layout and ground bounce and isolated-driver UVLO and protection checks.
