FAN7387 SMD
FAN7387 SMD
FAN7387 SMD
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FAN7387 — Self-Oscillated, High-Voltage Gate Driver
March 2014
FAN7387
Self-Oscillated, High-Voltage Gate Driver
Features Description
Internal Clock Using RCT The FAN7387 is a simple control IC for common half-
bridge inverters, SMPS, and ballast for fluorescent and
External Sync Function Using RCT
HID lamps. The FAN7387 has an oscillating circuit using
Dead Time Control Using Resistor an external resistor and capacitor.
Shut Down (Disable Mode)
The frequency variation is very stable across a wide
Internal Shunt Regulator temperature range. The FAN7387 has an external pin
UVLO Function, High and Low Side 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
Applications transistors and MOSFETs.
Half-Bridge Inverter
SMPS 8-DIP 8-SOP
Ballast Solution for High-Intensity Discharge
(HID) Lamp
Ballast for Fluorescent Lamp
Ordering Information
Part Number Package Operating Temperature Packing Method
(1)
FAN7387MX 8-SOP -40 to +125°C Tape & Reel
Note:
1. These device passed wave soldering test by JESD22A-111.
C1 VDC
D1
VDD C2
CT D2
1 RCT VB 8
FAN7387
R1 C3
RT1 RDT 2 VDD HO 7 M1
C5
C4
3 DT/ SD VS 6
R2 D3
Q1 Q2 4 GND LO 5 M2
Cb* RT2 C6
Frequency
Control Shutdown
GND
* 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)
FAN7387
FAN7387
Shunt
15V
SHORT-PULSE
GENERATOR
Generation
First Logic
Dead-time
Low-Side
Figure 5. Functional Block Diagram
Pin Configuration
Pin Definitions
Pin # Name Description
1 RCT Oscillator frequency set resistor and capacitor.
2 VDD Supply Voltage.
3 DT/SD Dead-time control and shutdown (active LOW).
4 GND Signal Ground.
5 LO Low-Side Output.
6 VS High-Side floating supply return.
7 HO High-Side output.
8 VB High-Side floating supply.
Oscillator Characteristics
RT=50 kΩ,
fosc1 Oscillation Frequency 1 18 20 22 kHz
CT=330 pF
fosc2 Oscillation Frequency 2 RT=1 kΩ, CT=1 nF 210 250 290 kHz
D Duty Cycle Running Mode 47.5 49.0 %
VRCT+ Upper Threshold Voltage of RCT Running Mode VDD V
VRCT- Lower Threshold Voltage of RCT Running Mode VDD /4 V
3/4
VIH Logic “1” Input Voltage of RCT Running Mode V
VDD
3/5
VIL Logic “0” Input Voltage of RCT Running Mode V
VDD
tD Dead-Time RDT=100 kΩ 500 600 700 ns
tDMIN Minimum Dead-Time VDT/SD=VDD 300 400 500 ns
Output Characteristics
IO+ Output High, Short-Circuit Pulse Current(3) PW≤10 µs 350 mA
Output Characteristics
VDD=VBS=14 V, VDT/SD=VDD,
tON Turn-On Propagation Time 550 ns
VRCT=4 V~VDD, fOSC=20 kHz
VDD=VBS=14 V, VDT/SD=VDD,
tOFF Turn-Off Propagation Time 160 ns
VRCT=4 V~VDD, fOSC=20 kHz
tR Turn-On Rising Time CL=1000 pF 50 120 ns
tF Turn-Off Falling Time CL=1000 pF 30 70 ns
Protection Characteristics
/SD+ Shutdown “1” Input Voltage 2.7 V
/SD- Shutdown “0” Input Voltage 1 V
ISD Shutdown Current VDT/SD=0 After Running Mode 250 µA
tSD Shutdown Propagation Delay 180 ns
Note:
3. These parameters, although guaranteed, is not 100% tested in production.
RCT
FAN7387
10 F
10 F LO
DT
HO
Figure 7. Test Circuit for Self-Oscillation Method Figure 8. Basic Operating Waveforms of
Self-Oscillation
FAN7387
10 F
10 F
Figure 9. Shutdown Delay Definition Figure 10. Test Circuit for Forced-Oscillation Method
Using External Signal
Figure 11. Basic Operation Waveforms of Forced-oscillation Method Using External Signal
200 12.5
12.0
150
VDDUV+ [V]
11.5
IST [A]
100 11.0
10.5
50
10.0
0 9.5
-40 -20 0 20 40 60 80 100 120 -40 -20 0 20 40 60 80 100 120
Temperature [°C] Temperature [°C]
Figure 12. Startup Current vs. Temperature Figure 13. VDD UVLO+ vs. Temperature
10.5 10.0
9.6
10.0
9.2
9.5
VBSUV+ [V]
VDDUV- [V]
8.8
9.0
8.4
8.5 8.0
8.0 7.6
7.2
7.5
-40 -20 0 20 40 60 80 100 120 -40 -20 0 20 40 60 80 100 120
Temperature [°C] Temperature [°C]
Figure 14. VDD UVLO- vs. Temperature Figure 15. VBS UVLO+ vs. Temperature
10.0 16.0
9.6
15.8
9.2
15.6
VBSUV- [V]
VCL [V]
8.8
15.4
8.4
8.0 15.2
7.6
15.0
7.2
14.8
-40 -20 0 20 40 60 80 100 120 -40 -20 0 20 40 60 80 100 120
Temperature [°C] Temperature [°C]
Figure 16. VBS UVLO- vs. Temperature Figure 17. VCL vs. Temperature
2.5 500
2.0 400
IPDD [mA]
IQDD [A]
1.5 300
1.0 200
0.5
100
0.0
-40 -20 0 20 40 60 80 100 120 0
-40 -20 0 20 40 60 80 100 120
Temperature [°C]
Temperature [°C]
Figure 18. IPDD vs. Temperature Figure 19. IQDD vs. Temperature
500 3.0
2.5
400
2.0
VSD+ [V]
ISD [A]
300
1.5
200
1.0
100 0.5
0.0
0 -40 -20 0 20 40 60 80 100 120
-40 -20 0 20 40 60 80 100 120
Temperature [°C]
Temperature [°C]
Figure 20. ISD vs. Temperature Figure 21. VSD+ vs. Temperature
3.0 23
22
2.5
21
VSD- [V]
fOSC1[kHz]
2.0 20
19
1.5
18
1.0 17
-40 -20 0 20 40 60 80 100 120 -40 -20 0 20 40 60 80 100 120
Figure 22. VSD- vs. Temperature Figure 23. Operating Frequency 1 vs. Temperature
280
500
270 475
260 450
fOSC2[kHz]
tDMIN[ns]
425
250
400
240
375
230 350
220 325
300
210 -40 -20 0 20 40 60 80 100 120
-40 -20 0 20 40 60 80 100 120
Temperature [°C]
Temperature [°C]
Figure 24. Operating Frequency 2 vs. Temperature Figure 25. tDMIN vs. Temperature
50 52
30
50
20
49
10
48
0
-40 -20 0 20 40 60 80 100 120 -40 -20 0 20 40 60 80 100 120
Temperature [°C] Temperature [°C]
Figure 26. Dead-Time Mismatch vs. Temperature Figure 27. High-Side Duty Ratio vs. Temperature
52
Duty at Low-Side Output [%]
51
50
49
48
-40 -20 0 20 40 60 80 100 120
Temperature [°C]
Figure 28. Low-Side Duty Ratio vs. Temperature Figure 29. Frequency vs. RT
CT
VDD
2 7 HO
DT/SD 3 6 VS
RT GND
4 5 LO
Figure 31. Typical Waveforms of RCT,LO and HO Figure 34. Gate Driver Using External PWM Signal
0.65
4.90±0.10 A
(0.635)
8 5
B
1.75
6.00±0.20 5.60
3.90±0.10
PIN ONE 1 4
INDICATOR
1.27
1.27
0.25 C B A LAND PATTERN RECOMMENDATION
SEE DETAIL A
0.175±0.75
0.22±0.30
1.75 MAX C
0.10
0.42±0.09 OPTION A - BEVEL EDGE
(0.86) x 45°
R0.10 GAGE PLANE
OPTION B - NO BEVEL EDGE
R0.10 0.36
NOTES: UNLESS OTHERWISE SPECIFIED
8°
0° A) THIS PACKAGE CONFORMS TO JEDEC
MS-012, VARIATION AA.
SEATING PLANE B) ALL DIMENSIONS ARE IN MILLIMETERS.
0.65±0.25 C) DIMENSIONS DO NOT INCLUDE MOLD
FLASH OR BURRS.
(1.04) D) LANDPATTERN STANDARD: SOIC127P600X175-8M.
DETAIL A E) DRAWING FILENAME: M08Arev15
SCALE: 2:1
F) FAIRCHILD SEMICONDUCTOR.
Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner
without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or
obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions,
specifically the warranty therein, which covers Fairchild products.
Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings:
http://www.fairchildsemi.com/dwg/M0/M08A.pdf.
Authorized Distributor
Fairchild Semiconductor:
FAN7387MX FAN7387M FAN7387N