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參數(shù)資料
| 型號： | SP6134HCU |
| 英文描述： | High Voltage, 600 KHz Synchronous PWM Controller |
| 中文描述： | 高電壓，600千赫同步PWM控制器 |
| 文件頁數(shù)： | 5/14頁 |
| 文件大小： | 141K |
| 代理商： | SP6134HCU |
5
Date: 8/4/04
SP6134H High Voltage, 600KHz Synchronous PWM Controller Copyright 2004 Sipex Corporation
General Overview
The SP6134H is a fixed frequency, voltage
mode, synchronous PWM controller optimized
for high efficiency. The part has been designed
to be especially attractive for split plane applica-
tions utilizing 5V to power the controller and 3V
to 12V for step down conversion.
The heart of the SP6134H is a wide bandwidth
transconductance amplifier designed to accom-
modate Type II and Type III compensation
schemes. A precision 0.8V reference present on
the positive terminal of the error amplifier per-
mits the programming of the output voltage
down to 0.8V via the V
FB
pin. The output of the
error amplifier, COMP, compared to a 1.1V
peak-to-peak ramp is responsible for trailing
edge PWM control. This voltage ramp and PWM
control logic are governed by the internal oscil-
lator that accurately sets the PWM frequency to
600kHz.
FUNCTIONAL DIAGRAM
THEORY OF OPERATION
The SP6134H contains two unique control fea-
tures that are very powerful in distributed appli-
cations. First, asynchronous driver control is
enabled during start up to prohibit the low side
NFET from pulling down the output until the
high side NFET has attempted to turn on. Sec-
ond, a 100% duty cycle timeout ensures that the
low side NFET is periodically enhanced during
extended periods at 100% duty cycle. This guar-
antees the synchronized refreshing of the BST
capacitor during very large duty ratios.
The SP6134H also contains a number of valu-
able protection features. A programmable input
(V
IN
) UVLO allows a user to set the exact value
at which the conversion voltage is at a safe point
to begin down conversion, and an internal V
CC
UVLO ensures that the controller itself has
enough voltage to properly operate. Other pro-
1.7 V
1.7 V
COMPARATOR
0.4 V
FAULT
CLR
CCLOCK
PULSES
600 kHZ
CLK
CLOCK PULSE GENERATOR
SS
GL HOLD OFF
100% Protection Logic
Q
R
S
RESET
DOMINANT
QPWM
CLK
SYNCHRONOUS
DRIVER
GND
3
2 GL
PWM LOOP
5 COMP
POS REF
FAULT
1
7
0.8V
CORE
REFERENCE
V
CC
FAULT
SOFTSTART INPUT
RAMP = 1.1V
VFBINT
VPOS
Gm
Gm ERROR AMPLIFIER
9GH
8SWN
10BST
V
FB
SS
10
μ
A
V
CC
V
CC
V
CC
FAULT
REF OK
FAULT
POWER FAULT
HICCUP FAULT
REF OK
VIN UVLO
VCC UVLO
2.50 VON
2.20 V OFF
6
UVIN
4.25 V ON
Q
VCC
REF OK
200ms Delay
COUNTER
CLR
CLK
R
SET
S
+
-
THERMAL
145 C ON
135 C OFF
SHORT CIRCUIT
VFBINT
+ -
VPOS
0.25 V
THERMAL AND SHORT CIRCUIT PROTECTION
UVLO COMPARATORS
+
-
+
-
相關PDF資料 |
PDF描述 |
|---|---|
| SP6136 | Evaluation Board Manual |
| SP6136_06 | Evaluation Board Manual |
| SP6136EB | Evaluation Board Manual |
| SP6136ER1 | Evaluation Board Manual |
| SP6137 | Wide Input, 900KHz Synchronous PWM Controller |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| SP6134HCU/TR | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Dual Supply Synchronous Buck Controller |
| SP6134HCU-L | 功能描述:開關變換器、穩(wěn)壓器與控制器 High Voltage,600 kHz Synchronous 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 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| SP6134HCU-L/TR | 功能描述:開關變換器、穩(wěn)壓器與控制器 High Voltage,600 kHz Synchronous 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 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| SP6134HEU | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Dual Supply Synchronous Buck Controller |
| SP6134HEU/TR | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Dual Supply Synchronous Buck Controller |
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