FAN7387M

FAN7387 — Self-Oscillated, High-Voltage Gate Driver May 2008 FAN7387 Self-Oscillated, High-Voltage Gate Driver Features Internal Clock Using RCT External Sync Function Using RCT Dead Time Control Using Resistor Shut Down (Disable Mode) Internal Shunt Regulator UVLO Function, High and Low Side Description The FAN7387 is a simple control IC for common halfbridge inverters, SMPS, and ballast for fluorescent and HID lamps. The FAN7387 has an oscillating circuit using an external resistor and capacitor. The frequency variation is very stable across a wide temperature range. The FAN7387 has a external pin for dead time control and shutdown. Using this resistor, the designer can choose the optimum dead time to reduce power loss on switching devices, such as transistors and MOSFETs. Applications Half-Bridge Inverter SMPS Ballast Solution for High-Intensity Discharge (HID) Lamp Ballast for Fluorescent Lamp 8-DIP 8-SOP Ordering Information Part Number FAN7387M(1) FAN7387MX(1) FAN7387N Package 8-SOP 8-DIP Operating Temperature Range -40°C ~ 125°C Packing Method Tube Tape & Reel Tube All standard Fairchild Semiconductor products are RoHS compliant and many are also “GREEN” or going green. For Fairchild’s definition of “green” please visit: http://www.fairchildsemi.com/company/green/rohs_green.html. Note: 1. These devices passed wave soldering test by JESD22A-111. © 2008 Fairchild Semiconductor Corporation FAN7387 Rev. 1.0.0 www.fairchildsemi.com FAN7387 — Self-Oscillated, High-Voltage Gate Driver Typical Application Diagrams C1 D1 VDD CT 1 RCT VB VDC C2 8 D2 R1 M1 C3 C4 C5 FAN7387 RT1 RDT 2 VDD HO 7 6 3 DT/ SD VS R2 LO D3 M2 C6 Q1 Frequency Control GND Q2 Cb* RT2 Shutdown 4 GND 5 * Note: This capacitor, Cb, is for system stability and must use at least 470nF. FAN7387 Rev1.0 Figure 1. Typical Application Circuit for SMPS (Self Oscillation Method) C1 VDD D1 C2 VDC R1 1 RCT VB 8 D2 R3 M1 C3 C4 C5 FAN7387 R2 RDT PWM Q1 2 VDD HO 7 6 3 DT/ SD VS R4 LO D3 M2 C6 Shutdown Q2 Cb* 4 GND 5 GND * Note: This capacitor, Cb, is for system stability and must use at least 470nF. FAN7387 Rev.1.0 Figure 2. Typical Application Circuit for SMPS Using External Signal © 2008 Fairchild Semiconductor Corporation FAN7387 Rev. 1.0.0 www.fairchildsemi.com 2 FAN7387 — Self-Oscillated, High-Voltage Gate Driver C1 VDD D1 C2 CT 1 RCT VB VDC D4 GND 8 8 VB RCT 1 FAN7387 RDT1 2 VDD R3 HO 7 6 M1 C3 L HID Lamp C5 M1 R5 7 HO 6 VS RDT2 VDD DT/ SD FAN7387 2 3 5 3 DT/ SD VS R4 LO R6 M2 C4 M2 4 LO Q1 Cb* Shutdown1 GND RT 4 GND 5 GND Q2 Cb* Shutdown2 GND R1 R2 * Note: This capacitor, Cb, is for system stability and must use at least 470nF. FAN7387 Rev.1.0 Figure 3. Typical Application Circuit for Full-Bridge Converter R1 D1 D3 CT 1 RCT D5 VB 8 RDT AC Input C1 C3 2 VDD FAN7387 R4 HO 7 6 M1 C4 D6 C5 L C6 3 DT/ SD VS C2 D2 D4 R2 Q1 R3 R5 LO RT1 Q2 Cb* RT2 4 GND 5 M2 D7 R6 C7 R7 C8 ZD1 * Note: This capacitor, Cb, is for system stability and must use at least 470nF. Lamp Over-Voltage Protection FAN7387 Rev1.0 Figure 4. Typical Application Circuit for Fluorescent Lamp Ballast © 2008 Fairchild Semiconductor Corporation FAN7387 Rev. 1.0.0 www.fairchildsemi.com 3 FAN7387 — Self-Oscillated, High-Voltage Gate Driver Internal Block Diagram HIGH-SIDE DRIVER VDD 2 15V Shunt UVLO VB UVLO Noise Canceller S R Q Q 8 7 6 VB HO VS SQ VDD/4 External Sync VDD Logic Detection Level R DQ Q Internal CLK (Frequency Divider) SHORT-PULSE GENERATOR SET RESET RCT 1 CLK/Sync Determination IN Dead-time Generation Low-Side First Logic HIN DT/SD 3 SHUTDOWN DT LIN DELAY 5 LO Always LIN First LOW-SIDE GATE DRIVER GND 4 HIN LIN Figure 5. Functional Block Diagram © 2008 Fairchild Semiconductor Corporation FAN7387 Rev. 1.0.0 www.fairchildsemi.com 4 FAN7387 — Self-Oscillated, High-Voltage Gate Driver Pin Configuration VB 8 HO 7 VS 6 LO 5 FAN7387 YWW ( YWW : Work Week Code) 1 2 3 4 RCT VDD DT/SD GND Figure 6. Pin Configuration (Top View) Pin Definitions Pin # 1 2 3 4 5 6 7 8 Name RCT VDD DT/SD GND LO VS HO VB Supply voltage Description Oscillator frequency set resistor and capacitor Dead-time control and shutdown (active LOW) Signal ground Low-side output High-side floating supply return High-side output High-side floating supply © 2008 Fairchild Semiconductor Corporation FAN7387 Rev. 1.0.0 www.fairchildsemi.com 5 FAN7387 — Self-Oscillated, High-Voltage Gate Driver Absolute Maximum Ratings Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only. TA=25°C unless otherwise specified. Symbol VB VS VRCT ICL dVS/dt TA TSTG PD θJA Note: High-side offset voltage RCT pins input voltage Clamping current level (2) Parameter High-side floating supply voltage Min. -0.3 -0.3 Typ. Max. 625.0 600.0 VCL 25 Unit V V V mA V/ns °C °C W °C/W Allowable offset voltage slew rate Operating temperature range Storage temperature range Power dissipation Thermal resistance (Junction-to-Air) 8-DIP 8-SOP 8-DIP 8-SOP -40 -65 50 +125 +150 1.2 0.625 100 200 2. Do not supply a low-impedance voltage source to the internal clamping Zener diode between the GND and the VDD pin of this device. Recommended Operating Ratings The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not recommend exceeding them or designing to absolute maximum ratings Symbol VB VS VDD VHO VLO VIH VIL RT CT TA Parameter High-side floating supply voltage High-side offset voltage Low-side supply voltage High-side (HO) output voltage Low-side (LO) output voltage Logic “1” input voltage of RCT Logic “0” input voltage of RCT Timing resistor value of RCT Timing capacitor value of RCT Ambient temperature Min. VS+11 6-VDD 11 GND GND (3/4 VDD)+1 Max. VS+14 600 14 VDD VDD (3/5 VDD)-1 Unit V V V V V V V kΩ pF 2 100 -40 +125 °C © 2008 Fairchild Semiconductor Corporation FAN7387 Rev. 1.0.0 www.fairchildsemi.com 6 FAN7387 — Self-Oscillated, High-Voltage Gate Driver Electrical Characteristics VBIAS (VDD, VB -VS)=14.0V, CL=1nF, RT=50k and CT=330pF and TA=25°C, unless otherwise specified. Symbol Parameter VDD supply under-voltage positive going threshold VDD supply under-voltage negative going threshold VDD supply under-voltage lockout hysteresis Supply clamping voltage Low-side quiescent supply current Start-up supply current Offset supply leakage current Low-side dynamic operating supply current VBS supply under-voltage negative going threshold VBS supply under-voltage negative going threshold VBS supply under-voltage lockout hysteresis High-side quiescent supply current High-side dynamic operating supply current Oscillation frequency 1 Oscillation frequency 2 Duty cycle Upper threshold voltage of RCT Lower threshold voltage of RCT Logic “1” input voltage of RCT Logic “0” input voltage of RCT Dead time Minimum dead time Output high, short-circuit pulse current Output low, short-circuit pulse current Allowable negative VS pin voltage for input signal (VRCT) propagation to HO Conditions Min. Typ. Max. Unit Low-Side Supply Characteristics (VDD) VDDUV+ VDDUVVDDUVH VCL IQDD IST ILK IPDD VDD Increasing VDD Decreasing 9.5 7.5 11.0 9.0 2 IDD=10mA RDT=100k VDD=9V VB=VS=600V 0.8 14.8 15.4 220 50 500 130 10 12.5 10.5 V V V V μA μA μA mA High-Side Supply Characteristics (VB-VS) VBSUV+ VBSUVVBSUVH IQBS IPBS fosc1 fosc2 D VRCT+ VRCTVIH VIL DT DTMIN IO+(3) IO(3) VB -VS Increasing VB -VS Decreasing 7.7 7.1 9.2 8.6 0.6 50 400 10.7 10.1 V V V 130 800 22 290 μA μA Oscillator Characteristics RT=50k, CT=330pF RT=1k, CT=1nF Running Mode Running Mode Running Mode Running Mode Running Mode RDT=100k VDT/SD=VDD PW