TPS61170-Q1 Datasheet, PDF (21/28 Pages) Texas Instruments – 1.2A High Voltage Boost Converter in 2x2mm2 QFN Package

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C3
1 mF
D1
TPS61170-Q1
SLVSAX2 – SEPTEMBER 2011
V_O1
-48 V/30 mA
VIN 3.3 V
L1
33 mH
C2
1 mF
D2
D3
C4
4.7 mF
V_O2
-24 V/40 mA
C1
4.7 mF
10 kW
10 nF
TPS61170
VIN
SW
CTRL
FB
COMP GND
D4
C5
4.7 mF
VIN
1 kW
Q1
1 kW
R1
23.7 kW
L1: TOKO B992AS-330M
C1: Murata GRM188R61A475K
D1 – D4: B140
Q1: BCM62B
R2
1.24 kW ^Q2
C2, C3: Murata GRM21BR71H105K Q2: MMBT3904TT1
C4, C5: Murata GRM32ER71H475K
Vo2 = 1.23 x (R1/ R2); Vo1 = 2Vo2
Figure 23. –24V / –48V Buck-Boost Converter from 3.3-V Input
VIN 12 V
C1
4.7 mF
10 nF
L1
15 mH pins 1-10
D1
1 10 2 9 3 8
60 kW
TPS61170
VIN
SW
CTRL
FB
COMP GND
39 pF
5.6 W
C2
4.7 mF
R1
100 kW
Vo = 1.23 x (R1+R2)/ R2;
R2
2.61 kW
L1: EPCOS N97
C1: Murata GRM21BR61E475K
C2: Murata GRM32ER71H475K
D1: MURA160
Figure 24. 12V to 48V Flyback Topology
V_O
48 V/75 mA
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Product Folder Link(s): TPS61170-Q1
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