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參數(shù)資料
| 型號(hào)： | SP6128ACY |
| 英文描述： | Low Voltage, Synchronous Step Down PWM Controller Ideal for 2A to 10A, Small Footprint, DC-DC Power Converters |
| 中文描述： | 低電壓，為第2A同步降壓PWM控制器的理想下至10A，占地面積小，DC - DC電源轉(zhuǎn)換器 |
| 文件頁(yè)數(shù)： | 3/10頁(yè) |
| 文件大小： | 135K |
| 代理商： | SP6128ACY |
3
Rev. 08/19/05
SP6128A Low Voltage, Synchronous Step Down PWM Controller Copyright 2005 Sipex Corporation
PIN DESCRIPTION
PIN N0. PIN NAME DESCRIPTION
1
GL
High current driver output for the low side MOSFET switch. It is always low if GH is high.
GL swings from PGND to PV
CC
.
Positive input supply for the low side gate driver. It's recommended to tie the PV
CC
to the
V
CC
pin.
Positive input supply for the logic circuitry. Properly bypass this pin to GND with a low ESL/
ESR ceramic capacitor or RC filter.
Power ground pin.
Signal ground pin.
Output of the Error Amplifier. It is internally connected to the inverting input of the PWM
comparator. A lead-lag network is typically connected to the COMP pin to compensate the
feedback loop in order to optimize the dynamic performance of the voltage mode control
loop. Sleep mode can be invoked by pulling the COMP pin below 0.3V with an external
open-drain or open-collector transistor. An internal 5
μ
A pull-up ensures start-up.
No connect.
Feedback Voltage Pin. It is the inverting input of the Error Amplifier and serves as the
output voltage feedback point for the Buck converter. The output voltage is sensed and
can be adjusted through an external resistor divider.
Overcurrent program pin. A resistor programs the overcurrent threshold. The overcurrent
comparator sets the fault latch and terminates gate pulses when VI
> V
and the high
side MOSFET is turned on. This prevents excessive power dissipation in the external
power MOSFETs during an overload condition. An internal delay circuit prevents false
shutdowns that might otherwise occur during very short, mild overload conditions,due to
load transients.
Lower supply rail for the GH high-side gate driver. It also connects to the Current Limit
comparator. Connect this pin to the switching node at the junction between the two
external power MOSFET transistors. This pin monitors the voltage drop across the R
DS(ON)
of the high side N-channel MOSFET while it is conducting.
High current driver output for the high side MOSFET switch. It is always low if GL is high or
during a fault. GH swings from SWN to BST.
High side driver supply pin. Connect BST to the external boost diode and capacitor as
shown in the application schematic on page 1.
2
PV
CC
3
V
CC
4
5
6
PGND
GND
COMP
7, 8, 9
10
NC
V
FB
11
I
SET
12
SWN
13
GH
14
BST
ELECTRICAL CHARACTERISTICS
Unless otherwise specified: -40
°
C < T
A
< 85
°
C, 3.0V < PV
CC
= V
CC
< 5.5V, C
COMP
= 22nF, CGH = CGL = 3.3nF, V
FB
= 0.8V,
SWN = GND = 0V, typical value for design guideline only.
PARAMETER
SOFT START, SHUTDOWN, UVLO
Internal Soft Start Slew Rate
COMP Discharge Current
COMP Clamp Voltage
COMP Clamp Current
Shutdown Threshold Voltage
Shutdown Input Pull-up Current
V
CC
Start Threshold
V
CC
Stop Threshold
GATE DRIVERS
GH Rise Time
GH Fall Time
GL Rise Time
GL Fall Time
GH to GL Non-Overlap Time
GL to GH Non-Overlap Time
MIN
TYP
MAX UNITS CONDITIONS
0.1
183
0.55
10
0.29
2
2.63
2.47
0.3
0.6
V/ms COMP pin, on transition from
μ
A
COMP = 0.5V, Fault Initiated
V
V
FB
= 0.9V
μ
A
COMP = 0.5V, V
FB
= 0.9V
V
Measured at COMP Pin
μ
A
COMP = 0.2V, Measured at COMP pin
V
V
shutdown
0.65
30
0.34
5
2.8
2.7
0.75
65
0.39
10
2.95
2.9
60
60
60
60
100
100
110
110
110
110
140
140
ns
ns
ns
ns
ns
ns
PV
CC
> 4.5V
PV
CC
> 4.5V
PV
CC
> 4.5V
PV
CC
> 4.5V
PV
CC
> 4.5V, measured at 2volt threshold
PV
CC
> 4.5V, measured at 2volt threshold
0
0
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SP6128ACY/TR | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Low Voltage, Synchronous Step Down PWM Controller Ideal for 2A to 10A, Small Footprint, DC-DC Power Converters |
| SP6128ACY-L | 功能描述:開(kāi)關(guān)變換器、穩(wěn)壓器與控制器 Low Voltage Synchronous Step Dwn RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開(kāi)關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| SP6128ACY-L/TR | 功能描述:開(kāi)關(guān)變換器、穩(wěn)壓器與控制器 Low Voltage Synchronous Step Dwn RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開(kāi)關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| SP6128AEY | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Low Voltage, Synchronous Step Down PWM Controller Ideal for 2A to 10A, Small Footprint, DC-DC Power Converters |
| SP6128AEY/TR | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Low Voltage, Synchronous Step Down PWM Controller Ideal for 2A to 10A, Small Footprint, DC-DC Power Converters |
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