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| 型号： | TPS51513RHB |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING CONTROLLER, PQCC32 |
| 封装： | 5 X 5 MM, GREEN, PLASTIC, QFN-32 |
| 文件页数： | 14/38页 |
| 文件大小： | 1159K |
| 代理商： | TPS51513RHB |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页当前第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页
–25
1.05
1.00
25
1.15
1.10
1.40
1.35
1.50
1.45
1.25
1.20
1.30
0
75
125
100
50
R
CS(eff)
R
T
J – Temperature – °C
R
C
S
(e
ff
)
–
C
u
rr
e
n
t
S
e
n
s
e
R
e
s
is
ta
n
c
e
–
m
W
P _ N
CS(eff )
DCR
SEQU
P _ N
R
=
+
(
)
PAR
NTC
SERIES
P _ N
PAR
NTC
SERIES
R
+
=
+
( )
RIPPLE
MAX
TRIPSEL min
CS eff
I
V
R
I
2
-
÷
÷
è
è
www.ti.com
SLUS956A – JUNE 2009 – REVISED FEBRUARY 2010
EFFECTIVE OUTPUT RESISTANCE
vs
TEMPERATURE
Figure 11.
In this case, the nearest standard values are:
RSEQU = 2.61 k;
RSERIES = 3.16 k;
RPAR = 12.7 k
CSENSE =180 nF
Note the effective divider ratio for the inductor DCR. The effective current sense resistance (RCS_Eff) is:
(12)
RP_N is the series/parallel combination of RNTC, RSERIES and RPAR.
(13)
RCS_Eff is 1.31m. Choose the value of TRIPSEL so the minimum TRIPSEL voltage is just above the voltage
across the current sense pins at the valley point of the current waveform. Maximize the value of RCS_Eff for
improved circuit performance.
(14)
In this case, the TRIPSEL minimum value needs to be greater than 29.8 mV; the next highest value in the
parameter table is 31.4 mV. This value corresponds to connecting TRIPSEL to VREF and RSLEW to VREF.
Step Six: Determine the output capacitor configuration. In general, for a system with a load-line, the ESR of the
output capacitors should be equal to or less than the load-line value. The magnitude and slew rate of the
dynamic load also drives the capacitor choice, as does the inductor selection. For highly dynamic systems, a
successful design has a combination of bulk and ceramic capacitance totaling approximately 1000mF.
Copyright 2009–2010, Texas Instruments Incorporated
21
Product Folder Link(s) :TPS51513
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相关代理商/技术参数 |
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|---|---|
| TPS51513RHBR | 功能描述:DC/DC 开关控制器 3-28V Input Sync. Step Down Controller RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| TPS51513RHBT | 功能描述:DC/DC 开关控制器 3-28V Input Sync. Step Down Controller RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| TPS51513RHBT | 制造商:Texas Instruments 功能描述:Controller IC |
| TPS51518RUKR | 功能描述:DC/DC 开关控制器 Sgl Phase DCAP & D-CAP2 Cntrlr RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| TPS51518RUKT | 功能描述:DC/DC 开关控制器 Sgl Phase DCAP & D-CAP2 Cntrlr RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
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