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参数资料
| 型号： | SP6120EB |
| 厂商： | Exar Corporation |
| 文件页数： | 13/22页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD FOR SP6120 |
| 标准包装： | 1 |
| 系列： | * |
THEORY OF OPERATIONS: Continued
switch. It is during this interval that the 3%
window comparator has taken control away from
the main loop. The main loop regains control
only if the output voltage crosses through its
regulated value. Also notice where the 3%
comparator takes over. The output voltage is
considered “high” only if the trough of the ripple
driver waveforms for the 5V, high side NFET
design.
As with all synchronous designs, care must be
taken to ensure that the MOSFETs are properly
chosen for non-overlap time, peak current capa-
bility and efficiency.
is above 3%. The output voltage is considered
“low” only if the peak of the ripple is below 3%.
By managing the secondary loop in this fashion,
5V
90%
GATE DRIVER TEST CONDITONS
the SP6120 can improve the transient response
of high performance power converters without
GH (GL)
10%
2V
FALL TIME
causing strange disturbances in low to moderate
performance systems.
5V
RISE TIME
90%
Driver Logic
Signals from the PWM latch (QPWM), Fault
latch (FAULT), Program Logic, Zero Crossing
GH (GL)
2V
10%
Comparator, and 3% Window Comparators all
flow into the Driver Logic. The following is a
truth table for determining the state of the GH
and GL voltages for given inputs:
GH
Voltage
V(BST)
NON-OVERLAP
D R I V E R L O G I C T R U T H T A B L E
0V
F A U L T
1
1
0
0
0
0
0
0
0
0
V(V CC )
Q P W M o r
3 % C O M P
X
X
1
1
0
0
0
0
0
0
N F E T / P F E T
C O N T / D I S C
Z E R O C R O S S
G H
G L
N
X
X
0
0
P
X
X
1
0
N
X
X
1
0
P
X
X
0
0
N
C
X
0
1
P
C
X
1
1
N
D
0
0
1
P
D
0
1
1
N
D
1
0
0
P
D
1
1
0
GL
Voltage
0V
V(V CC = V IN )
SWN
Voltage
The QPWM and 3% Comparators are grouped
together because 3% Low is the same as QPWM
= 1 and 3% High is the same as QPWM = 0.
Output Drivers
The driver stage consists of one high side, 4 ?
driver, GH and one low side, 4 ? , NFET driver,
GL. As previously stated, the high side driver
can be configured to drive a PFET or an NFET
high side switch. The high side driver can also be
configured as a switch node referenced driver.
Due to voltage constraints, this mode is manda-
tory for 5V, single supply, high side NFET
applications. The following figure shows typical
~0V
~V(Diode) V
~2V(V IN )
BST
Voltage
~V(V IN )
TIME
Date: 1/21/05
SP6120 Low Voltage, AnyFET TM , Synchronous, Buck Controller
13
? Copyright 2005 Sipex Corporation
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SP6120EY | 功能描述:开关变换器、稳压器与控制器 Low Voltage, AnyFET Synchronous, Cntrllr 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 |
| SP6120EY/TR | 功能描述:开关变换器、稳压器与控制器 Low Voltage, AnyFET Synchronous, Cntrllr 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 |
| SP6120EY-L | 功能描述:DC/DC 开关控制器 Low Voltage, AnyFET Synchronous, Cntrllr 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 |
| SP6120EY-L/TR | 功能描述:DC/DC 开关控制器 Low Voltage, AnyFET Synchronous, Cntrllr 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 |
| SP6120HV | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:High Voltage, Synchronous ,Buck Controller Ideal for 2A to 20A, High Performance, DC-DC Power Converters |
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