Overview
The TPL7407LA-Q1 is a high-voltage, high-current NMOS transistor array produced by Texas Instruments. This device integrates seven low-side NMOS transistors, each capable of sinking up to 600 mA of current. It is designed to drive high-voltage and high-current peripherals from microcontrollers or logic devices that cannot handle such conditions. The TPL7407LA-Q1 features internal level shifting and gate drive circuitry, enabling full operation with low GPIO voltages ranging from 1.8 V to 5 V. This device is particularly useful for applications requiring the drive of inductive loads such as relays, solenoids, and motors, as well as LEDs and other resistive loads.
Key Specifications
| Parameter | Test Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| VOL (VDS) | VIN ≥ 1.5 V, ID = 100 mA | 210 | 450 | - | mV |
| VOL (VDS) | VIN ≥ 1.5 V, ID = 200 mA | 430 | 900 | - | mV |
| VIL | ID = 5 µA | - | 0.9 | - | V |
| VIH | ID = 100 mA | - | 1.5 | - | V |
| IOUT(OFF) | VOUT = 30 V, VIN ≤ 0.9 V | 10 | - | 500 | nA |
| VF | IF = 200 mA | - | 1.4 | - | V |
| IIN(off) | VINX = 0 V, VOUT = 30 V | 500 | - | - | nA |
| IIN(ON) | VINX = 1.5 V – 5 V | - | 10 | - | µA |
| ICOM | VCOM = 6.5 V – 30 V | 17 | - | 30 | µA |
| tPLH | VINX ≥ 1.65 V, Vpull-up = 30 V, Rpull-up = 48 Ω | 350 | - | - | ns |
| tPHL | VINX ≥ 1.65 V, Vpull-up = 30 V, Rpull-up = 48 Ω | 350 | - | - | ns |
Key Features
- Power Efficiency: Very low output low voltage (VOL), less than 4 times lower than Darlington arrays at 100 mA.
- Low Leakage: Very low output leakage current of less than 10 nA per channel.
- High-Voltage Outputs: Capable of handling up to 30 V.
- Compatibility with Microcontrollers: Compatible with 1.8-V to 5-V microcontroller and logic interfaces.
- Internal Free-wheeling Diodes: For inductive kick-back protection.
- Input Pull-down Resistors: Allows tri-stating the input drivers.
- Input RC-Snubber: To eliminate spurious operation in noisy environments.
- ESD Protection: Exceeds JESD 22 standards with 2-kV HBM and 500-V CDM.
- Level Shifting and Gate Drive Circuitry: Enables high output current drive with low input voltage.
Applications
- Inductive Loads: Relays, unipolar stepper and brushed DC motors, solenoids, and valves.
- LEDs: Driving LED arrays.
- Logic Level Shifting: For interfacing between different voltage levels.
- Gate and IGBT Drive: For power electronics applications.
Q & A
- What is the maximum current each channel of the TPL7407LA-Q1 can sink?
Each channel can sink up to 600 mA of current.
- What is the voltage range for the input interface of the TPL7407LA-Q1?
The input interface is compatible with 1.8-V to 5-V CMOS logic.
- What is the purpose of the internal free-wheeling diodes in the TPL7407LA-Q1?
The internal free-wheeling diodes are used to suppress kick-back voltage from inductive loads.
- How does the TPL7407LA-Q1 handle ESD protection?
The device exceeds JESD 22 standards with 2-kV HBM and 500-V CDM ESD protection.
- Can the outputs of the TPL7407LA-Q1 be paralleled for higher current capability?
Yes, the outputs can be paralleled to increase the current handling capability.
- What is the recommended voltage range for the COM pin supply?
The COM pin supply should be between 6.5 V and 30 V for full functionality.
- How does the input RC-snubber help in the TPL7407LA-Q1?
The input RC-snubber helps prevent spurious switching in noisy environments.
- What type of loads can the TPL7407LA-Q1 drive?
The device can drive inductive loads such as relays, motors, and solenoids, as well as resistive loads like LEDs.
- What is the temperature range over which the TPL7407LA-Q1 can operate?
The device can operate over a temperature range of –40°C to +125°C.
- How does the TPL7407LA-Q1 compare to traditional Darlington arrays in terms of power efficiency?
The TPL7407LA-Q1 dissipates less than half the power of traditional relay drivers with currents less than 250 mA per channel.
