TPS61193 Datasheet, PDF (9/33 Pages) Texas Instruments – High-Performance 3-Channel LED Driver

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6.12 Typical Characteristics
Unless otherwise specified: D = NRVB460MFS, T = 25ºC
TPS61193
SNVSAF4 – OCTOBER 2015
1000
900
800
700
600
500
400
300
200
5
Vboost = 22 V
Vboost = 30 V
Vboost = 37 V
10
15
20
25
30
Input Voltage (V)
C001
ƒ_SW = 300 kHz
L = 33 μH
DC Load (PWM = 100%)
C_OUT = 33 µF + 2 × 10 µF (cer.) C_IN = 33 µF + 2 × 10 µF (cer.)
Figure 1. Maximum Boost Current
1000
900
800
700
600
500
400
300
200
5
10
ƒ_SW = 1.5 MHz
C_OUT = 2 × 10 µF (cer.)
Vboost = 22 V
Vboost = 30 V
Vboost = 37 V
15
20
25
30
Input Voltage (V)
C003
L = 8.2 μH
C_IN= 2 × 10 µF (cer.)
DC Load (PWM = 100%)
Figure 3. Maximum Boost Current
100
1000
900
800
700
600
500
400
300
200
5
Vboost = 22 V
Vboost = 30V
Vboost = 37 V
10
15
20
25
30
Input Voltage (V)
C002
ƒ_SW = 800 kHz
L = 15 μH
C_IN = 2 × 10 µF (cer.)
C_OUT = 2 ×10 µF (cer.)
DC Load (PWM = 100%)
Figure 2. Maximum Boost Current
1000
900
800
700
600
500
400
300
200
5
10
ƒ_SW = 2.2 MHz
C_OUT = 2 × 10 µF (cer.)
Vboost = 22 V
Vboost = 30 V
Vboost = 37 V
15
20
25
30
Input Voltage (V)
C004
L = 4.7 μH
C_IN = 2 × 10 µF (cer.)
DC Load (PWM = 100%)
Figure 4. Maximum Boost Current
2200
80
1800
60
1400
40
1000
20
600
0
20
40
60
80
100 120 140 160
R_ISET (k )
C005
200
20
60
100
140
180
220
R_FSET (k )
C009
Figure 5. LED Current vs R_ISET
Figure 6. Boost Switching Frequency ƒ_SW vs R_FSET
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