BQ500101 Datasheet, PDF (9/20 Pages) Texas Instruments – NexFET Power Stage

www.ti.com
Typical Application (continued)
8.2.1 Application Curves
T_J = 125°C, unless stated otherwise
3
2.5
2
1.5
1
0.5
0
1
2.5
V_IN = 10 V
ƒ_SW = 130 kHz
4
5.5
7
Output Current (A)
V_DD = 5 V
L_SW = 6 µH
Typ
Max
8.5
10
D002
Duty Cycle = 50%
Figure 3. Power Loss vs Output Current
12
10
8
6
4
400 LFM
2
200 LFM
100 LFM
Nat. conv.
0
0 10 20 30 40 50 60
Ambient Temperature (qC)
V_IN = 10 V
ƒ_SW = 130 kHz
V_DD = 5 V
L_SW = 6 µH
70 80 90
D004
Duty Cycle = 50%
Figure 5. Safe Operating Area – PCB Horizontal Mount ⁽¹⁾
1.15
1.2
1.12
0.9
1.09
0.7
1.06
0.5
1.03
0.2
1
0.0
0.97
40
130 220 310 400 490
Switching Frequency (kHz)
V_IN = 10 V
I_SW = 5 A
V_DD = 5 V
L_SW = 6 µH
-0.2
580 670
D007
Duty Cycle = 50%
Figure 7. Normalized Power Loss vs Frequency
bq500101
SLPS585 – MARCH 2016
1.1
1
0.9
0.8
0.7
0.6
0.5
-50 -25
V_IN = 10 V
ƒ_SW = 130 kHz
0 25 50 75 100 125 150
T_C - Junction Temperature (qC)
D003
V_DD = 5 V
L_SW = 6 µH
Duty Cycle = 50%
Figure 4. Power Loss vs Temperature
12
10
8
6
4
2
Min
Typ
0
0
20
V_IN = 10 V
ƒ_SW = 130 kHz
40
60
80 100 120 140
Board Temperature (qC)
D006
V_DD = 5 V
L_SW = 6 µH
Duty Cycle = 50%
Figure 6. Typical Safe Operating Area
1.15
1.2
1.1
0.8
1.05
0.4
1
0.0
0.95
-0.4
0.9
-0.8
0.85
024
I_SW = 5 A
ƒ_SW = 130 kHz
6 8 10 12
Input Voltage (V)
V_DD = 5 V
L_SW = 6 µH
-1.2
14 16 18
D008
Duty Cycle = 50%
Figure 8. Normalized Power Loss vs Input Voltage
(1) LFM: Linear Feet per Minute (Air Flow Velocity)
Copyright © 2016, Texas Instruments Incorporated
Submit Documentation Feedback
9