Datasheet

0
10
20
30
40
50
60
70
80
90
100
0 0.5 1 1.5 2
V
I
= 12 V,
V
O
= 15 V,
L = 10 H
I
O
− Output Current − A
Efficiency − %
0
0.02
0.04
0.06
0.08
0.1
0.12
0.14
0.16
−40 −20 0 20 40 60 80 100 120 140
r
DS(on)
− N-Channel Switch −
T
A
− Temperature − 5C
Ω
V
I
= 8 V,
V
I
= 12 V,
V
I
= 14 V
TPS65161
TPS65161A, TPS65161B
SLVS617E –APRIL 2006–REVISED MARCH 2013 www.ti.com
TABLE OF GRAPHS
FIGURE
MAIN BOOST CONVERTER (Vs)
η Efficiency main boost converter V
S
vs Load current V
S
= 15 V, V
IN
= 12 V 1
r
DS(ON)
N-channel main switch Q1 vs Input voltage and temperature 2
Soft-start boost converter C
SS
= 22 nF 3
PWM operation at full-load current 4
PWM operation at light-load current 5
Load transient response 6
STEP-DOWN CONVERTER (V
(LOGIC)
)
η Efficiency main boost converter V
S
vs Load current V
(LOGIC)
= 3.3 V, V
IN
= 12 V 7
r
DS(ON)
N-channel main switch Q5 8
PWM operation - continuous mode 9
PWM operation - discontinuous mode 10
Soft start 11
Load transient response 12
SYSTEM PERFORMANCE
f
osc
Oscillation frequency vs Input voltage and temperature 13
Power-up sequencing EN2 connected to V
IN
14
Power-up sequencing EN2 enabled separately 15
TYPICAL CHARACTERISTICS
BOOST CONVERTER
BOOST CONVERTER EFFICIENCY r
DS(on)
- N-CHANNEL SWITCH
vs vs
OUTPUT CURRENT TEMPERATURE
Figure 1. Figure 2.
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