参数资料
型号: MAX17004ETJ+T
厂商: Maxim Integrated Products
文件页数: 20/36页
文件大小: 0K
描述: IC PS CTRLR FOR NOTEBOOKS 32TQFN
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,500
应用: 控制器,笔记本电脑电源系统
输入电压: 6 V ~ 26 V
输出数: 4
输出电压: 3.3V,5V,2 V ~ 5.5 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 32-WFQFN 裸露焊盘
供应商设备封装: 32-TQFN-EP(5x5)
包装: 带卷 (TR)
High-Efficiency, Quad-Output, Main Power-
Supply Controllers for Notebook Computers
Output Discharge (Soft-Discharge)
When the switching regulators are disabled—when ON_
or SHDN is pulled low, or when an output undervoltage
fault occurs —the internal soft-discharge gradually
decreases the output voltage by pulling DSCHG_ low
(see the SMPS Shutdown Waveform in the Typical
Operating Characteristics). This slowly discharges the
output capacitance, eliminating the negative output volt-
ages caused by quickly discharging the output through
the inductor and low-side MOSFET. Both SMPS con-
trollers contain separate soft-shutdown circuits.
Fixed-Frequency, Current-Mode
PWM Controller
The heart of each current-mode PWM controller is a
multi-input, open-loop comparator that sums two sig-
nals: the output-voltage error signal with respect to the
reference voltage and the slope-compensation ramp
(Figure 3). The MAX17003/MAX17004 use a direct-
summing configuration, approaching ideal cycle-to-
cycle control over the output voltage without a
traditional error amplifier and the phase shift associated
with it.
FROM FB
(SEE FIGURE 5)
SLOPE COMP
SOFT-
START/STOP
REF
ON_
SKIP
GND
OSC
FSEL
TRI-LEVEL
DECODE
0.2 x VLIMIT
0.1 x V LIMIT
IDLE MODE
CURRENT
PEAK CURRENT
R
S
Q
DH DRIVER
ILIM
A = 1/10
LIMIT
A = 1.2
NEG CURRENT
LIMIT
S
CSH_
CSL_
ZERO
CROSSING
R
Q
DL DRIVER
PGND
DRVA
ONE-SHOT
OUTA
5V SMPS ONLY
Figure 3. PWM Controller Functional Diagram
20
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MAX17005BETP+ 功能描述:电池管理 1.2MHz High-Perf Charger RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel
MAX17005BETP+T 功能描述:电池管理 1.2MHz High-Perf Charger RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel
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