- 您現(xiàn)在的位置：買(mǎi)賣(mài)IC網(wǎng) > PDF目錄383333 > MAX1714 (Maxim Integrated Products, Inc.) High-Speed Step-Down Controller for Notebook Computers PDF資料下載
參數(shù)資料
| 型號(hào)： | MAX1714 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | High-Speed Step-Down Controller for Notebook Computers |
| 中文描述： | 高速、降壓型控制器，用于筆記本電腦 |
| 文件頁(yè)數(shù)： | 10/24頁(yè) |
| 文件大?。?/td> | 443K |
| 代理商： | MAX1714 |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)當(dāng)前第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)第19頁(yè)第20頁(yè)第21頁(yè)第22頁(yè)第23頁(yè)第24頁(yè)
M
+5V Bias Supply (V
CC
and V
DD
)
The MAX1714 requires an external +5V bias supply in
addition to the battery. Typically, this +5V bias supply is
the notebook’s 95% efficient +5V system supply.
Keeping the bias supply external to the IC improves effi-
ciency and eliminates the cost associated with the +5V
linear regulator that would otherwise be needed to sup-
ply the PWM circuit and gate drivers. If stand-alone
capability is needed, the +5V supply can be generated
with an external linear regulator such as the MAX1615.
The battery and +5V bias inputs can be tied together if
the input source is a fixed +4.5V to +5.5V supply. If the
+5V bias supply is powered up prior to the battery sup-
ply, the enable signal (
SHDN
) must be delayed until the
battery voltage is present in order to ensure startup. The
+5V bias supply must provide V
CC
and gate-drive
power, so the maximum current drawn is:
I
BIAS
= I
CC
+ f (Q
G1
+ Q
G2
) = 5mA to 30mA (typ)
where I
CC
is 600μA typical, f is the switching frequency,
and Q
G1
and Q
G2
are the MOSFET data sheet total
gate-charge specification limits at V
GS
= 5V.
Free-Running, Constant-On-Time PWM
Controller with Input Feed-Forward
The Quick-PWM control architecture is a pseudo-fixed-fre-
quency, constant-on-time current-mode type with voltage
feed-forward (Figure 2). This architecture relies on the out-
put filter capacitor’s ESR to act as the current-sense resis-
tor, so the output ripple voltage provides the PWM ramp
signal. The control algorithm is simple: the high-side
switch on-time is determined solely by a one-shot whose
period is inversely proportional to input voltage and direct-
ly proportional to output voltage. Another one-shot sets a
minimum off-time (400ns typical). The on-time one-shot is
triggered if the error comparator is low, the low-side switch
current is below the current-limit threshold, and the mini-
mum off-time one-shot has timed out.
High-Speed Step-Down Controller
for Notebook Computers
10
______________________________________________________________________________________
Table 1. Component Selection for Standard Applications
Table 2. Component Suppliers
4.5V to 5.5V
600kHz
7V to 20V
300kHz
7V to 20V
300kHz
Input Range
Frequency
100μF, 10V
Sanyo POSCAP 10TPA100M
(2) 470μF 6V
Kemet T510X477108M006AS
470μF, 6V
Kemet T510X477108M006AS
C2 Output Capacitor
100μF, 10V
Sanyo POSCAP 10TPA100M
(2) 10μF, 25V
Taiyo Yuden TMK432BJ106KM
10μF, 25V
Taiyo Yuden TMK432BJ106KM
C1 Input Capacitor
3.3μH
Coiltronics UP1B-3R3
1.5μH
Sumida CEP1251R5MC
6.8μH
Coilcraft DO3316P-682
L1 Inductor
Motorola MBR0520LT1
Motorola MBRS340T3
Nihon EP10QY03
D2 Rectifier
International Rectifier
1/2 IRF7301
Fairchild Semiconductor
FDS6670A
Fairchild Semiconductor
1/2 FDS6982A
Q2 Low-Side
MOSFET
International Rectifier
1/2 IRF7301
International Rectifier
IRF7811
Fairchild Semiconductor
1/2 FDS6982A
Q1 High-Side
MOSFET
2.5V AT 1.5A
1.6V AT 8A
2.5V AT 4A
COMPONENT
[1] 602-994-6430
602-303-5454
814-237-1431
800-831-9172
Motorola
[1] 408-986-1442
[1] 714-960-6492
408-986-0424
714-969-2491
Kemet
Matsuo
[1] 408-721-1635
[1] 310-322-3332
408-822-2181
310-322-3331
Fairchild
International Rectifier
[1] 561-241-9339
561-241-7876
Coiltronics
[1] 847-639-1469
847-639-6400
Coilcraft
[1] 516-435-1824
516-435-1110
Central Semiconductor
[1] 803-626-3123
803-946-0690
AVX
FACTORY FAX
[Country Code]
USA PHONE
MANUFACTURER
[1] 408-573-4159
[1] 847-390-4405
408-573-4150
847-390-4461
Taiyo Yuden
TDK
[1] 603-224-1430
[81] 3-3607-5144
603-224-1961
847-956-0666
Sprague
Sumida
[1] 408-970-3950
408-988-8000
800-554-5565
Siliconix
[81] 7-2070-1174
619-661-6835
Sanyo
[81] 3-3494-7414
805-867-2555*
NIEC (Nihon)
[1] 814-238-0490
Murata
*Distributor
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX1714AEEP | High-Speed Step-Down Controller for Notebook Computers |
| MAX1714BEEE | High-Speed Step-Down Controller for Notebook Computers |
| MAX1715 | Ultra-High Efficiency, Dual Step-Down Controller for Notebook Computers |
| MAX1715EEI | Ultra-High Efficiency, Dual Step-Down Controller for Notebook Computers |
| MAX1717 | Replaced by TMS320VC5506 : Digital Signal Processors 132-BQFP |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX17140AETL+T | 制造商:Maxim Integrated Products 功能描述:DC-DC FOR TV - Tape and Reel |
| MAX17140ETL+ | 功能描述:電池管理 12Ch Battery Sensor w/SMBus Ladder RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| MAX17140ETL+T | 功能描述:電池管理 12Ch Battery Sensor w/SMBus Ladder RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| MAX17140EVKIT+ | 功能描述:電源管理IC開(kāi)發(fā)工具 MAX17140 Eval Kit RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| MAX17141ETG+ | 功能描述:轉(zhuǎn)換 - 電壓電平 V6 Level Shifter RoHS:否 制造商:Micrel 類型:CML/LVDS/LVPECL to LVCMOS/LVTTL 傳播延遲時(shí)間:1.9 ns 電源電流:14 mA 電源電壓-最大:3.6 V 電源電壓-最小:3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MLF-8 |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。