The UCC27511 and UCC27512 single-channel, high-speed, low-side gate-driver device can effectively drive MOSFET and IGBT power switches. Using a design that inherently minimizes shoot-through current, UCC27511 and UCC27512 are capable of sourcing and sinking high peak-current pulses into capacitive loads offering rail-to-rail drive capability and extremely small propagation delay, typically 13 ns.
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
UCC27511 | SOT-23 (6) | 2.90 mm x 1.60 mm |
UCC27512 | WSON (6) | 3.00 mm x 3.00 mm |
Changes from E Revision (December 2013) to F Revision
Changes from D Revision (May 2013) to E Revision
Changes from C Revision (June 2012) to D Revision
Changes from B Revision (March, 2012) to C Revision
UCC27511 features a dual-input design which offers flexibility of implementing both inverting (IN– pin) and noninverting (IN+ pin) configuration with the same device. Either 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 safety purpose, internal pullup and pulldown resistors on the input pins ensure that outputs are held low when input pins are in floating condition. Hence 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 UCC27511 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.
The UCC27511 and UCC27512 provides 4-A source, 8-A sink (asymmetrical drive) peak-drive current capability. Strong sink capability in asymmetrical drive boosts immunity against parasitic, Miller turnon effect. The UCC27511 device also features a unique split output configuration where the gate-drive current is sourced through OUTH pin and sunk through OUTL pin. This unique pin arrangement allows the user to apply independent turnon and turnoff resistors to the OUTH and OUTL pins respectively and easily control the switching slew rates.
UCC27511 and UCC27512 are designed to operate over a wide VDD range of 4.5 to 18 V and wide temperature range of –40°C to 140°C. Internal Undervoltage Lockout (UVLO) circuitry on VDD pin holds 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 band-gap power-switching devices such as GaN power-semiconductor devices.
The UCC2751x family of gate-driver products (Table 1) represent Texas Instruments’ latest generation of single-channel low-side high-speed gate-driver devices featuring high-source/sink current capability, industry best-in-class switching characteristics and a host of other features (Table 2) all of which combine to ensure efficient, robust and reliable operation in high-frequency switching power circuits.
PART NUMBER | PACKAGE | PEAK CURRENT (SOURCE/SINK) | INPUT THRESHOLD LOGIC |
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UCC27511DBV | SOT-23, 6 pin | 4-A/8-A (Asymmetrical Drive) |
CMOS/TTL-Compatible (low voltage, independent of VDD bias voltage) |
UCC27512DRS | 3-mm x 3-mm WSON, 6 pin | ||
UCC27516DRS (1) | 3-mm x 3-mm WSON, 6 pin | 4-A/4-A (Symmetrical Drive) |
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UCC27517DBV (1) | SOT-23, 5 pin | ||
UCC27518DBV (1) | SOT-23, 5 pin | CMOS (follows VDD bias voltage) |
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UCC27519DBV (1) | SOT-23, 5 pin |
FEATURE | BENEFIT |
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High Source and Sink Current Capability 4 A and 8 A (Asymmetrical) – UCC2751/6/7/8/9 4 A and 4 A (Symmetrical) – UCC27511 and UCC27512 |
High current capability offers flexibility in employing UCC2751x family of devices 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 band-gap power devices such as GaN |
Expanded Operating Temperature range of –40°C to 140°C (See Electrical Characteristics table) |
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VDD UVLO Protection | Outputs are held low in UVLO condition, which ensures predictable glitch-free operation at power up and power down |
Outputs held low when input pins (INx) in floating condition | Safety feature, especially useful in passing abnormal condition tests during safety certification |
Ability of input pins (and enable pin in UCC27518/9) to handle voltage levels not restricted by VDD pin bias voltage | System simplification, especially related to auxiliary bias supply architecture |
Split output structure in UCC27511 (OUTH, OUTL) | Allows independent optimization of turnon and turnoff speeds |
Strong sink current (8 A) and low pulldown impedance (0.375 Ω) in UCC27511 and UCC27512 | High immunity to C x dV/dt Miller turnon events |
CMOS/TTL compatible input-threshold logic with wide hysteresis in UCC27511, UCC27512, UCC27516 and UCC27517 | Enhanced noise immunity, while retaining compatibility with microcontroller logic-level input signals (3.3 V, 5 V) optimized for digital power |
CMOS input threshold logic in UCC27518/9 (VIN_H – 70% VDD, VIN_L – 30% VDD) | Well suited for slow input-voltage signals, with flexibility to program delay circuits (RCD) |