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| ISL6721_07 Datasheet, PDF (19/21 Pages) Intersil Corporation – Flexible Single Ended Current Mode PWM Controller | |||
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ISL6721
NOTE:
Trace 1: VD-S
Trace 3: VG-S
FIGURE 12. GATE AND DRAIN-SOURCE WAVEFORMS
Component List
TABLE 2.
REFERENCE
DESIGNATOR VALUE
DESCRIPTION
C1, C2, C3
C5, C13
C15, C16, C19,
C20
C17
C18
C21, C22
C4, C14
C6
1.0μF
0.1μF
560μF
Capacitor, 1812, X7R, 100V, 20%
Capacitor, 0603, X7R, 25V, 10%
Capacitor, Radial, SANYO 4SEP560M
470pF Capacitor, 0603, COG, 50V, 5%
0.01μF Capacitor, 0805, X7R, 50V, 10%
22μF Capacitor, 1210, X5R, 10V, 20%
100pF Capacitor, 0603, COG, 50V, 5%
1500pF Capacitor, Disc, Murata
DE1E3KX152MA5BA01
C7
C8
330pF
C9, C10, C11, C12 0.22μF
CR2, CR6
CR4, CR5
D1
D2
Q1
Q2
Q3
R1, R2
1.00k
R10
20.0k
0Ω Jumper, 0603
Capacitor, 0603, COG, 50V, 5%
Capacitor, 0603, X7R, 16V, 10%
Diode, Fairchild ES1C
Diode, IR 12CWQ03FN
Zener, 18V, Zetex BZX84C18
Diode, Schottky, BAT54C
FET, Fairchild FDS2570
Transistor, Zetex FMMT491A
Transistor, ON MJD31C
Resistor, 1206, 1%
Resistor, 0603, 1%
TABLE 2.
REFERENCE
DESIGNATOR VALUE
DESCRIPTION
R7, R9, R11, R26, 10.0k
R27
R12
38.3k
R13, R15, R17,
R18, R19, R25
1.00k
R14
10
R16
165
R21
10.0
R22
5.11
R24
3.92k
R3, R23
100
R4
1.00
R5
221k
R6
75.0k
R8, R20
T1
U2
U3
U4
VR1
Resistor, 0603, 1%
Resistor, 0603, 1%
Resistor, 0603, 1%
Resistor, 0603, 1%
Resistor, 0603, 1%
Resistor, 1206, 1%
Resistor, 0603, 1%
Resistor, 2512, 1%
Resistor, 0603, 1%
Resistor, 2512, 1%
Resistor, 0603, 1%
Resistor, 0603, 1%
OMIT
Transformer, MIDCOM 31555
Opto-coupler, NEC PS2801-1
Shunt Reference, National LM431BIM3
PWM, Intersil ISL6721IB
Zener, 15V, Zetex BZX84C15
References
[1] Ridley, R., âA New Continuous-Time Model for Current
Mode Controlâ, IEEE Transactions on Power
Electronics, Vol. 6, No. 2, April 1991.
[2] Dixon, Lloyd H., âClosing the Feedback Loopâ, Unitrode
Power Supply Design Seminar, SEM-700, 1990.
19
FN9110.4
April 13, 2007
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