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IR1175S

P1-P3P4-P6P7-P9P10-P11
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IR1175
20
19
18
4
3
2
1
DTOUT2
VFLTRI
DTIN2
RADV1
VFLTR2
DTIN1
DTOUT1
RADV2
17
5
7
6
8
16
15
14
13
RVCO1
X1
RVCO2
X2
VSS
Q2*VDD
Q1
9
10
12
11
AVDD
UVSET
AVSS
RBIAS
IR1175S
(SSOP-20)
IR1175SS
SOIC (wide body)
Lead Definitions and Assignments
Symbol Description
AVDD Power - + 5 V
DC
to MOSFET drivers
Q1 Output - gate drive for Q1 power MOSFET
DTOUT1 Output - sets dead time for Q1 output - used with DTIN1
DTIN1 Input - sets dead time for Q1 - used with DTOUT1
RADV1 Output - sets lead time (advance) for Q1
VFLTR1 Output - PLL loop filter for Q1 output
RVCO1 Output - sets PLL center frequency for Q1 output
X1 Input - transformer input for Q1
VDD Power - +5 Vdc for internal logic
UVSET Input - sets UVLO+ If this pin is pulled below 1.25VDC externally, then both Q1 and Q2
outputs will be at Vss (disabled)
RBIAS Output - connected to 69.8K +/- 1% resistor - sets operating current
AVSS Ground for logic supply (AVDD)
X2 Input - transformer input for Q2
RVCO2 Output - sets PLL center frequency for Q2 output
VFLTR2 Output - PLL loop filter for Q2
RADV2 Output - sets lead time (advance) for Q2
DTIN2 Input - sets dead time for Q2 - used with DTOUT2
DTOUT2 Output - sets dead time for Q2 - used with DTIN2
VSS Ground for MOSFET driver supply (VDD)
Q2 Output - gate drive for Q2 power MOSFET
IR1175
PDIP
20
19
18
4
3
2
1
DTOUT2
VFLTRI
DTIN2
RADV1
VFLTR2
DTIN1
DTOUT1
RADV2
17
5
7
6
8
16
15
14
13
RVCO1
X1
RVCO2
X2
VSS
Q2
*VDD
Q1
9
10
12
11
AVDD
UVSET
AVSS
RBIAS
20
19
18
4
3
2
1
DTOUT2
VFLTRI
DTIN2
RADV1
VFLTR2
DTIN1
DTOUT1
RADV2
17
5
7
6
8
16
15
14
13
RVCO1
X1
RVCO2
X2
VSS
Q2*VDD
Q1
9
10
12
11
AVDD
UVSET
AVSS
RBIAS
www.irf.com 5
IR1175
Fig. 1 Typical application circuit when supply Vout < 5.0 V
DC
Fig. 2 Typical application circuit when supply Vout = 5.0 V
DC
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IR1175
Fig. 3 Gate drive characteristics and definitions
Phase Lock Loop Design Equations:
1 - Resistor to set VCO Ceter Frequency:
Rvco (KΩ) = 143 x [Vchgpump(V
DC
) / fvco(KHz)] x Kvco _ dc(KHz/Volt)
Example (A): Choose Vchgpump = 1.5V, desired frequency (fvco) = 300KHz
Rvco = 143 x [1.5 /300] x 62 Hz/Volt = 44.33 KΩ
2 - Small Signal gain for VCO:
Kvco_ac (KHz/Volt) = 1E3 x Kvco_dc (KHz/Volt)/(7 x Rvco(KΩ)
Example (B): Choosing same conditions as in example A:
Kvco_ac = 1E3 x 62 / (7 x 44.33) = 199.9 KHz/volt
P1-P3P4-P6P7-P9P10-P11

IR1175S

Mfr. #:
Buy IR1175S
Manufacturer:
Infineon Technologies
Description:
IC DRIVER SYNCH RECT 20-SSOP
Lifecycle:
New from this manufacturer.
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