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参数资料
| 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： | 4/38页 |
| 文件大小： | 1159K |
| 代理商： | TPS51513RHB |
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T – Time
V
o
lt
a
g
e
–
V
Current
Feedback
T
ON
T
V
CMP
V
DROOP
f
OUT
ON
IN
SEL
V
1
t
30 ns
V
=
+
÷
÷
è
è
SLUS956A – JUNE 2009 – REVISED FEBRUARY 2010
www.ti.com
PWM Operation
Referring to Figure 1 and Figure 4, in steady state, continuous conduction mode, the converter operates as
follows:
Starting with the condition that the top FET is off and the bottom FET is on, the current feedback (VCMP) is higher
than the error amplifier output (VDROOP). VCMP falls until it hits VDROOP, which contains a component of the output
ripple voltage. The PWM comparator senses where the two waveforms cross and triggers the on-time generator.
Figure 4. D-CAP+ Mode Basic Waveforms
The current feedback is an amplified and filtered version of the voltage between the CSP and CSN inputs. The
TPS51513 provides fully differential current and voltage feedback to increase the system accuracy and reduce
the dependence of circuit performance on layout.
PWM Frequency and Adaptive On-Time Control
The on-time is determined by Equation 1.
where
(1)
The on-time pulse is sent to the top FET; the inductor current and the current feedback rises to its maximum
value. Each ON pulse is latched to prevent double pulsing.
12
Copyright 2009–2010, Texas Instruments Incorporated
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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