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UCC27517A-Q1 Datasheet(PDF) 10 Page - Texas Instruments

Part # UCC27517A-Q1
Description  Single-Channel High-Speed Low-Side Gate Driver
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

UCC27517A-Q1 Datasheet(HTML) 10 Page - Texas Instruments

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UCC27517A-Q1
SLVSC88B – AUGUST 2013 – REVISED AUGUST 2015
www.ti.com
9 Detailed Description
9.1 Overview
The UCC2751xA-Q1 single-channel, high-speed, low-side gate-driver device is capable of effectively driving
MOSFET and IGBT power switches. Using a design that inherently minimizes shoot-through current, the
UCC2751x device is capable of sourcing and sinking high peak-current pulses into capacitive loads offering rail-
to-rail drive capability and extremely small propagation delay of 13 ns (typical). The UCC2751xA-Q1 family of
devices provides 4-A source, 4-A sink (symmetrical drive) peak-drive current capability. The device is designed
to operate over a wide VDD range of 4.5 to 18 V, and a wide temperature range of –40°C to 140°C. Internal
undervoltage lockout (UVLO) circuitry on the VDD pin holds the output low outside VDD operating range. The
capability to operate at low voltage levels, such as below 5 V, along with best-in- class switching characteristics,
is especially suited for driving emerging wide bandgap power-switching devices such as GaN power-
semiconductor devices.
The UCC27511A-Q1 device features a dual-input design which offers flexibility of implementing both inverting
(IN– pin) and non-inverting (IN+ pin) configuration with the same device. Either the IN+ or IN– pin can be used to
control the state of the driver output. The unused input pin can be used for enable and disable functions. For
system robustness, internal pull-up and pull-down resistors on the input pins ensure that outputs are held low
when the input pins are in floating condition. Therefore the unused input pin is not left floating and must be
properly biased to ensure that driver output is in enabled for normal operation.
The input pin threshold of the UCC27517A-Q1 device is based on TTL and CMOS-compatible low-voltage logic
which is fixed and independent of the VDD supply voltage. Wide hysteresis between the high and low thresholds
offers excellent noise immunity.
Table 2. UCC27517A-Q1 Summary
PEAK CURRENT (SOURCE,
PART NUMBER
PACKAGE
INPUT THRESHOLD LOGIC
SINK)
CMOS and TTL-Compatible
4-A, 4-A
UCC27517ADBVQ1
SOT-23, 5 pin
(low voltage, independent of VDD
(Symmetrical Drive)
bias voltage)
Table 3. UCC27517A-Q1 Features and Benefits
FEATURE
BENEFIT
High current capability offers flexibility in employing the UCC27517A-
High Source, Sink Current Capability 4 A, 4 A (Symmetrical)
Q1 to drive a variety of power switching devices at varying speeds
Best-in-class 13-ns (typ) Propagation delay
Extremely low-pulse transmission distortion
Expanded VDD Operating range of 4.5 V to 18 V
Flexibility in system design
Low VDD operation ensures compatibility with emerging wide-
Expanded Operating Temperature range of –40°C to 140°C
bandgap power devices such as GaN
(See Recommended Operating Conditions table)
Outputs are held low in UVLO condition, which ensures predictable
VDD UVLO Protection
glitch-free operation at power up and power down
Protection feature, especially useful in passing abnormal condition
Outputs held low when input pins (INx) in floating condition
tests during protection certification
Ability of input pins to handle voltage levels not restricted by VDD pin
System simplification, especially related to auxiliary bias supply
bias voltage
architecture
Enhanced noise immunity, while retaining compatibility with
CMOS and TTL compatible input threshold logic with wide hysteresis
microcontroller logic-level input signals (3.3 V, 5 V) optimized for
in UCC27517A-Q1
digital power
Ability to handle –5 VDC at input pins
Increased robustness in noisy envirnments
10
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Copyright © 2013–2015, Texas Instruments Incorporated
Product Folder Links: UCC27517A-Q1


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