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参数资料
| 型号： | TPS54353PWPR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 6.5 A SWITCHING REGULATOR, 600 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封装： | GREEN, PLASTIC, HTSSOP-16 |
| 文件页数： | 34/35页 |
| 文件大小： | 858K |
| 代理商： | TPS54353PWPR |
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TPS54352,TPS54353
TPS54354,TPS54355
TPS54356,TPS54357
SLVS519A MAY 2004 REVISED OCTOBER 2004
www.ti.com
8
FUNCTIONAL BLOCK DIAGRAM
VBIAS
PH
BOOT
VIN
LSG
VBIAS
Error
Amplifier
2x Oscillator
PWM Ramp
(FeedFoward)
SYNC
RT
VSENSE
PWM
Comparator
Reference
System
ENA
VBIAS2
Hiccup
Timer
Thermal
Shutdown
Current Limit
Hiccup
UVLO
1.2V
Bias + Drive
Regulator
PWRGD
AGND
PGND
Rising
Edge
Delay
VBIAS
COMP
Adaptive Deadtime
and
Control Logic
97% Ref
POWERPAD
VSENSE
UVLO
S
R
Q
320 k
125 k
(1)
5
A
(1) 75 k for the TPS54357
Z3
Z1
Z2
Z5
Z4
TPS5435X
DETAILED DESCRIPTION
Undervoltage Lockout (UVLO)
The undervoltage lockout (UVLO) system has an internal
voltage divider from VIN to AGND. The defaults for the
start/stop values are labeled VIN and given in Table 1. The
internal UVLO threshold can be overridden by placing an
external resistor divider from VIN to ground. The internal
divider values are approximately 320 k
for the high side
resistor and 125 k
for the low side resistor. The divider
ratio (and therefore the default start/stop values) is quite
accurate, but the absolute values of the internal resistors
may vary as much as 15%. If high accuracy is required for
an externally adjusted UVLO threshold, select lower value
external resistors to set the UVLO threshold. Using a 1-k
resistor for the low side resistor (R2 see Figure 1) is
recommended. Under no circumstances should the UVLO
pin be connected directly to VIN.
Table 1. Start/Stop Voltage Threshold
START VOLTAGE THRESHOLD
STOP VOLTAGE THRESHOLD
VIN (Default)
TPS543526
4.49
3.69
VIN (Default)
TPS54357
6.65
5.45
UVLO
1.24
1.02
The equations for selecting the UVLO resistors are:
R1
+
VIN(start)
1k
W
1.24 V
* 1kW
VIN(stop)
+
(R1
) 1kW)
1.02 V
1k
W
(1)
(2)
相关PDF资料 |
PDF描述 |
|---|---|
| TPS54356PWPG4 | 6.5 A SWITCHING REGULATOR, 600 kHz SWITCHING FREQ-MAX, PDSO16 |
| TPS54356PWPR | 6.5 A SWITCHING REGULATOR, 600 kHz SWITCHING FREQ-MAX, PDSO16 |
| TPS54354PWPRG4 | 6.5 A SWITCHING REGULATOR, 600 kHz SWITCHING FREQ-MAX, PDSO16 |
| TPS54355PWPR | 6.5 A SWITCHING REGULATOR, 600 kHz SWITCHING FREQ-MAX, PDSO16 |
| TPS54357PWPR | 6.5 A SWITCHING REGULATOR, 600 kHz SWITCHING FREQ-MAX, PDSO16 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS54353PWPRG4 | 功能描述:开关变换器、稳压器与控制器 4.5 to 20V Inp 3-A Synch PWM Switch RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| TPS54354 | 制造商:TI 制造商全称:Texas Instruments 功能描述:4.5V TO 20 V INPUT 3-A OUTPUT SYNCHRONOUS PWM SWITCHER WITH INTEGRATED FET |
| TPS54354-EP | 制造商:TI 制造商全称:Texas Instruments 功能描述:4.5-V TO 20-V INPUT, 3-A OUTPUT SYNCHRONOUS PWM SWITCHES |
| TPS54354MPWPREP | 功能描述:直流/直流开关调节器 Mil Enh 4.5V-20V 3A Out Synch-Buck PWM RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| TPS54354PWP | 功能描述:直流/直流开关调节器 4.5 to 20V Inp 3-A Synch PWM Switch RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
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