參數(shù)資料
型號： LM5642
廠商： National Semiconductor Corporation
英文描述： High Voltage, Dual Synchronous Buck Converter with Oscillator Synchronization
中文描述： 高電壓，雙同步降壓轉(zhuǎn)換器振蕩器同步
文件頁數(shù)： 5/24頁
文件大?。?/td> 667K
代理商： LM5642
Electrical Characteristics
(Continued)
Unless otherwise specified, V
= 28V, GND = PGND = 0V, VLIN5 = VDD1 = VDD2. Limits appearing in
boldface
type apply
over the specified operating junction temperature range, (-40C to +125C, if not otherwise specified). Specifications appearing
in plain type are measured using low duty cycle pulse testing with T
A
= 25C (Note 6), (Note 7). Min/Max limits are guaranteed
by design, test, or statistical analysis.
Symbol
V
UVP
Parameter
Conditions
Min
Typ
Max
Units
FB1, FB2, Under
Voltage Protection Latch
Threshold
Hysteresis
V
OUT
Overvoltage
Shutdown Latch
Threshold
SW1, SW2
ON-Resistance
As a percentage of nominal output
voltage (falling edge)
75
80.7
86
%
3.7
%
V
OVP
As a percentage measured at V
FB1
,
V
FB2
107
114
122
%
S
wx_R
V
SW1
= V
SW2
= 0.4V
420
487
560
Gate Drive
I
CBOOT
CBOOTx Leakage
Current
HDRVx and LDRVx
Source Current
HDRVx Sink Current
V
CBOOT1
= V
CBOOT2
= 7V
10
nA
I
SC_DRV
V
CBOOT1
= V
CBOOT2
= 5V, VSWx=0V,
HDRVx=LDRVx=2.5V
V
CBOOTx
= VDDx = 5V, V
SWx
= 0V,
HDRVX = 2.5V
V
CBOOTx
= VDDx = 5V, V
SWx
= 0V,
LDRVX = 2.5V
V
CBOOT1
= V
CBOOT2
= 5V,
V
SW1
= V
SW2
= 0V
0.5
A
I
sk_HDRV
0.8
A
I
sk_LDRV
LDRVx Sink Current
1.1
A
R
HDRV
HDRV1 & 2 Source
On-Resistance
HDRV1 & 2 Sink
On-Resistance
LDRV1 & 2 Source
On-Resistance
LDRV1 & 2 Sink
On-Resistance
3.1
1.5
R
LDRV
V
CBOOT1
= V
CBOOT2
= 5V,
V
SW1
= V
SW2
= 0V
V
DD1
= V
DD1
= 5V
3.1
1.1
Oscillator and Sync Controls
F
osc
Oscillator Frequency
Don_max
Maximum On-Duty Cycle
5.5
≤
V
IN
≤
36V
V
FB1
= V
FB2
= 1V, Measured at pins
HDRV1 and HDRV2
166
200
226
kHz
96
98.9
%
T
on_min
SS
OT_delta
Minimum On-Time
HDRV1 and HDRV2
Delta On Time
SYNC Pin Min High
Input
SYNC Pin Max Low
Input
166
ns
ON/SS1 = ON/SS2 = 2V
20
250
ns
V
HS
2
1.52
V
V
LS
1.44
0.8
V
Error Amplifier
I
FB1
, I
FB2
Feedback Input Bias
Current
COMP Output Source
Current
V
FB1_FIX
= 1.5V, V
FB2_FIX
= 1.5V
80
±
200
nA
I
comp1_SC
,
I
comp2_SC
V
FB1_FIX
= V
FB2_FIX
= 1V,
V
COMP1
= V
COMP2
= 1V
-20C to 85C
V
FB1_FIX
= V
FB2_FIX
= 1.5V and
V
COMP1
= V
COMP2
= 0.5V
-20C to 85C
6
127
μA
18
I
comp1_SK
,
I
comp2_SK
COMP Output Sink
Current
6
118
μA
18
gm1, gm2
Transconductance
720
μmho
L
www.national.com
5
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM5642_07 制造商:NSC 制造商全稱:National Semiconductor 功能描述:High Voltage, Dual Synchronous Buck Converter with Oscillator Synchronization
LM5642EVAL-KIT 功能描述:BOARD EVALUATION LM5642 RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - DC/DC 與 AC/DC（離線）SMPS 系列:PowerWise® 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:True Shutdown™ 主要目的:DC/DC，步升 輸出及類型:1，非隔離 功率 - 輸出:- 輸出電壓:- 電流 - 輸出:1A 輸入電壓:2.5 V ~ 5.5 V 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):升壓 頻率 - 開關(guān):3MHz 板類型:完全填充 已供物品:板 已用 IC / 零件:MAX8969
LM5642EVAL-KIT/NOPB 功能描述:電源管理IC開發(fā)工具 LM5642 EVAL KIT RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V
LM5642MH 制造商:Texas Instruments 功能描述:
LM5642MH/NOPB 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
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