ViewSonic VS15197 Service Manual page 52

PL3
VDD_SYS
HI0805R800R-10/5A
+19V
PC12 PC13
0.1u/50V_6 2200p/50V_4
VDD_5V0
PL5
HI0805R800R-10/5A
PL6
2.2uH/14A_11.5X10.3X4.5
+5VPCU1
TDC = 3.5A
OCP = 6A
f = 400kHz
PC21 PC23
+ 0.1u/50V_6 PR9
6.65K/F_4
150u/6.3V_3528
2200p/50V_4
PR14
4.32K/F_4
AGND_DC/DC
R_TRIP1 = ( I_lim(6A) - 2.79A/2 ) * 14(mohm) * 10 / 10u
= 63.35K (ohm)
Vref=2V R1= (Vout-2) * R2 / 2
for Heat Sink
H1 H2 H3 H4
H-C315D169P2 H-C315D169P2 H-C315D169P2 H-C315D138P2 H-C276D163P2
H-C315D169P2 H-C315D169P2 H-C315D169P2 H-C315D138P2 H-C276D163P2
1 1 1 1
ViewSonic Corporation
+19V
VDD_SYS
PL17
HI0805R800R-10/5A
PC82 PC81
0.1u/50V_6
10u/25V_1206
Iripple=(Vin-Vout)*Vout/(Vin*L*f)
O.C.P setup information
Output
Mos Rds_on I_OCP OC_∆IL(A) Freq(KHz) Inductor
R_TRIP
5V 14m_Max
3.3V 14m_Max
PR4
PC16
100K/F_4
10u/25V_1206
PR5
200K/F_4
RT8223PZQW
PQ3
4
RQ3E070BNFU7TB
8223EN
PC19 PR7 5V_UG
0.1u/50V_6 1/F_6
1 2 5V_BOOT
5V_PHASE
5V_LG
PR10
2.2/F_6
4
PQ4
T142
RQ3E100BSFU7TB
PC26
Rds(on)=14 mohm
PR15
63.4K/F_4
AGND_DC/DC
---> 63.4Kohm (PR125)
H5 H6
H-C276D163P2
H-C276D163P2
1 1
+19VDC_IN +19VIN
PC7 PC85
0.1u/50V_6
10u/25V_1206 2200p/50V_4
3.68 4.7uH 63.4K
400
5
8.5 2.2uH
2.18 500 105K
VDD_5V0_SBY
PR3 VDD_3V3_SBY
2.2/F_6
PC17 PC14 PC15
4.7u/10V_6 4.7u/10V_6
0.1u/50V_6
PC18 0.22u/50V_6
AGND_DC/DC
+19V
VDD_5V0_SBY
PU1
PR6 0_4
13 4 8223TON 2 1
EN0 TONSEL
21 10
3V_UG
UGATE1 UGATE2
PC20 0.1u/50V_6
22 9 3V_BOOT 1 2
BOOT1 BOOT2
PR8 1/F_6
20 11 3V_PHASE
PHASE1 PHASE2
19 12 3V_LG
LGATE1 LGATE2
24
VOUT1
2 7
FB1 OUT2
23 5
PGOOD FB2
ENTRIP1
ENTRIP2
VDD_5V0_SBY
AGND_DC/DC
PR17 *0_4
PR16 2 1
PR19 0_4
105K/F_4 2 1
VDD_5V0_SBY AGND_DC/DC
AGND_DC/DC PR20 0_4
2 1
PR21 *0_4
2 1
R_TRIP2 = ( I_lim(8.5A) - 2.47A/2 ) * 14(mohm) * 10 / 10u
AGND_DC/DC
PR22
0_6
PR23
0_6
PR24
0_6
AGND_DC/DC
51
Confidential - Do Not Copy
+19VDC_IN
PL1
HI0805R800R-10/5A
1
PC8 PC80 PC84
2
0.1u/25V_4
2200p/50V_4
3
Power On sequencing
EN0 ENC REF VREG3 VREG5 SMPS1
LOW LOW OFF OFF
OFF OFF
LOW ON ON ON OFF
> 2.4V
> 2.4V > 2.4V ON ON ON ON
PL2
HI0805R800R-10/5A
PC10 PC9 PC11
0.1u/50V_6 2200P/50V_4 10u/25V_1206
4
PQ2
RQ3E070BNFU7TB
PL7
2.2uH/14A_11.5X10.3X4.5
PR11
2.2/F_6 PR12
6.65K/F_4 PR13
4 PQ7 PC24 0_4
RQ3E100BSFU7TB
2200p/50V_4
Rds(on)=14 mohm
PR18
10.2K/F_4
AGND_DC/DC
= 105.1K (ohm) ---> 105Kohm (PR136)
Vref=2V R1= (Vout-2) * R2 / 2
VSD241/SD-A245/CDS245
DC-IN JACK
PJ1
2DC2019-000121
SMPS2
OFF
OFF
ON
+19V
VDD_SYS
VDD_3V3_PMU
PL4
HI0805R800R-10/5A
TDC = 6.35A
OCP = 8.5A
PC25
PC27 +
f = 500kHz
0.1uF/16V_4 150u/6.3V_3528