UC3176QPTR

UC3176 UC3177 Full Bridge Power Amplifier FEATURES DESCRIPTION • Dual Power Operational Amplifiers The UC3176/7 family of full bridge power amplifiers is rated for a continuous output current of 2A. Intended for use in demanding servo applications such as disk head positioning, the onboard current sense amplifier can be used to obtain precision control of load current, or where voltage mode drive is required, a standard voltage feedback scheme can be used. Output stage protection includes foldback current limiting and thermal shutdown, resulting in a very rugged device. • ±2A Output Current Guaranteed • Precision Current Sense Amplifier • Two Supply Monitoring Inputs • Parking Function and Under-Voltage Lockout • Safe Operating Area Protection • 3V to 35V Operation Auxiliary functions on this device include a dual input under-voltage comparator that can be programmed to respond to low voltage conditions on two independent supplies. In response to an under-voltage condition the power Op-Amps are inhibited and a high current, 100mA, open collector drive output is activated. A separate Park/Inhibit command input. The devices are operational over a 3V to 35V supply range. Internal under-voltage lockout provides predictable power-up and power-down characteristics. BLOCK DIAGRAM SLUS285A - OCTOBER 1994 - REVISED JANUARY 2005 UC3176 UC3177 CONNECTION DIAGRAM ABSOLUTE MAXIMUM RATINGS (Note 1) Input Supply voltage, (+VIN) . . . . . . . . . . . . . . . . . . . . . . . . 40V Park/Inhibit, UV1 and UV2 inputs (zener clamped) Maximum forced voltage . . . . . . . . . . . . . . . . . –0.3V to 10V Maximum forced current . . . . . . . . . . . . . . . . . . . . . . ±10mA Other Input Voltages . . . . . . . . . . . . . . . . . . . . . . –0.3V to +VIN AlSINK and BlSINK Voltages . . . . . . . . . . . . . . . . . . . –0.3V to 6V Open Collector Output Voltages . . . . . . . . . . . . . . . . . . . . . 40V A and B Output Currents (Continuous) Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internally Limited Sink . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5A Total Supply Current (Continuous) . . . . . . . . . . . . . . . . . . . . 4A Parking Drive Output Current (Continuous) . . . . . . . . . . 200mA Supply OK Output Current, UC3177 (Continuous) . . . . . . 30mA Operating Junction Temperature . . . . . . . . . . –55°C to +150°C Power Dissipation at TC = +75°C QP package. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4W Storage Temperature . . . . . . . . . . . . . . . . . . . –65°C to +150°C PLCC-28 (Top View) QP Package THERMAL DATA *Pin 9: UC3176, B+ Input UC3177, Supply OK QP package: Thermal Resistance Junction to Leads, θJL . . . . . . . 15°C/W Thermal Resistance Junction to Ambient, θJA . . . . . 50°C/W Thermal Resistance Junction to COSC, θJC . . . . . . . 30°C/W PACKAGE PIN FUNCTION FUNCTION PIN +VIN B Output BISINK (Sense) BISINK N/C B– Input * Park/Inhibit Parking Drive Gnd (Heat Flow Pins) UV1 UV2 Current Feedback A+ Input A– Input N/C AISINK AISINK (Sense) A Output Gnd 1 2 3 4 5-7 8 9 10 11 12-18 19 20 21 22 23 24 25 26 27 28 ELECTRICAL CHARACTERISTICS:Unless otherwise stated, specifications hold for TA = 0 to 70°C, +VIN = 12V, TA = TJ. PARAMETER TEST CONDITIONS MIN. TYP. MAX. UNITS Input Supply Supply Current UVOL Threshold +VIN = 12V 18 25 mA +VIN = 35V 21 30 mA +VIN low to high 2.8 3.0 V Threshold Hysteresis 220 300 mV 8 mV 35 µA/V 200 nA Power, Amplifier, A and B Input Offset Voltage VCM = 6V, VOUT = 6V Input Bias Current VCM = 6V, Except A+ Input Input Bias Current at A+/Reference Input (A+/REF - BISINK) /36kΩ; TJ = 25°C Input Offset Current B Amp (UC3176 Only) VCM = 6V –500 –100 23 28 nA CMRR VCM = 1 to 33V, +VIN = 35V, VOUT = 6V 70 100 dB PSRR +VIN = 5 to 35V, VCM = 2.5V 70 100 dB Large Signal Voltage Gain VOUT = 3V, w/IOUT = 1A to VOUT = 9V, w/IOUT = –1A 1.5 4 V/mV Thermal Feedback +VIN = 20V, Pd = 20W at opposite output 25 Saturation Voltage IOUT = –2A, High Side, TJ = 25° 1.9 CIOUT = 2A, Low Side, TJ = 25°C 1.6 Total VSAT at 2A, TJ = 25°C 3.5 200 µV/W V V 3.7 V Unity Gain Bandwidth 1 MHz Slew Rate 1 V/µs Differential IOUT Sense Error Current in Bridge Configuration High Side Current Limiting IOUT(A) = –IOUT(B), /IOUT / – /AISINK - BISINK / IOUT ≤ 200mA 3.0 6.0 mA IOUT ≤ 2A 5.0 10 mA =VIN - VOUT < 12V –2.7 –2.0 A 2 UC3176 UC3177 ELECTRICAL CHARACTERISTICS:Unless otherwise stated, specifications hold for TA = 0 to 70°C, +VIN = 12V, TA = TJ. PARAMETER TEST CONDITIONS MIN. TYP. MAX. UNITS Current Sense Amplifier Input Offset Voltage VCM = 0V, A+ / REF at 6V REF = 2V to 20V, +VIN = 35, change with REF Input voltage Thermal Gradient Sensitivity +VIN = 20V, REF = 10V Pd = 20W @ A or B Output 5.0 PSRR REF = 2.5V, +VIN = 5 to 35V 70 100 Gain /AISINK-BISINK / ≤ 0.5V 7.8 8.0 Slew Rate 3dB Bandwidth 2.5 3 mV 600 µV/V 75.0 µV/W dB 8.1 V/V 2 V/µS 1 MHz MAX Output Current ISOURCE = +VIN - VOUT = 0.5V 3.5 Output Saturation Voltage ISOURCE = 1.5mA, High Side 0.15 0.30 mA V ISINK = 5mA, Low Side 1.4 1.85 V 1.44 1.50 1.56 V 50 70 80 mV –2.00 –.05 Under-Voltage Comparator Threshold Voltage Low to High, other input at 5V Threshold Hysteresis µA Input Current Input = 2V, other input at 5V Supply OK VSAT (UC3177 Only) IOUT = 5mA 0.45 V Supply OK Leakage (UC3177 Only) VOUT = 35V 5 µA 1.3 1.7 V µA Park/Inhibit Park/Inhibit Thl’d 1.1 Park/Inhibit Input Current At threshold 60 100 Parking Drive Saturation Voltage IOUT = 100mA 0.3 0.7 V Parking Drive Leakage VOUT = 35V 15 µA Thermal Shutdown Shutdown Temperature Output saturation voltage vs. current. 165 Maximum source current vs. + VIN – VOUT. 3 Crossover current error characteristic. °C UC3176 UC3177 APPLICATION AND OPERATION INFORMATION WAVEFORMS FOR ABOVE APPLICATION DESIGN EQUATIONS Transconductance (GO) = IL R F 2  1 = × VS R F1  8R S    with: RSA = RSB and RF3 = RF4 Parking Current (IP) = VIN − 15 . RP +RL where: RL = load resistance Under-Voltage Thresholds, at Supplies High to Low Threshold, (VLH) = 1.425 (RA + RB)/RB Low to High Threshold, (VHL) = 1.5 (RA + RB)/RB 4 PACKAGE OPTION ADDENDUM www.ti.com 29-Jun-2018 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan Lead/Ball Finish MSL Peak Temp (2) (6) (3) Op Temp (°C) Device Marking (4/5) UC3176QP NRND PLCC FN 28 37 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR 0 to 70 UC3176QP UC3176QPTR NRND PLCC FN 28 750 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR 0 to 70 UC3176QP (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may reference these types of products as "Pb-Free". RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption. Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of