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參數(shù)資料
| 型號： | AN1071 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 元件分類： | 圓形連接器 |
| 英文描述： | Circular Connector; No. of Contacts:6; Series:MS27508; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:8; Circular Contact Gender:Pin; Circular Shell Style:Box Mount Receptacle; Insert Arrangement:8-35 RoHS Compliant: No |
| 中文描述： | 信息關(guān)于LM2650評估板 |
| 文件頁數(shù)： | 2/6頁 |
| 文件大?。?/td> | 77K |
| 代理商： | AN1071 |
TABLE 1. A Complete List of Pads for Placing Components
Label
U1
#
1
4
0
Notes
For placing the LM2650.
Capacitors placed here filter high-frequency switching noise from the input power rail.
These pads should not be labeled with a C. No component is placed here. They can be
used to ground the SLEEP LOGIC input. The pad connected to the SLEEP LOGIC pin can
be used to pull the input up.
A capacitor placed here also filters high-frequency switching noise from the input power rail
but at the VIN rail, the rail used by the signal-level circuits inside the IC.
Usually no component is placed here. A capacitor might be placed here for loop
compensation purposes, but most applications don’t use it.
A capacitor is placed here for loop compensation purposes.
The bootstrap capacitor is placed here.
A capacitor is placed here for loop compensation purposes. This capacitor and an internal
6.5 k
resistor create an integrator pole.
The bulk input capacitors are placed here.
The output filter capacitors are placed here.
A capacitor placed here programs the soft-start interval.
A capacitor placed here bypasses the output of the VDD regulator.
The inductor is placed here.
One of the feedback resistors is placed here.
The other feedback resistor is placed here.
A resistor is placed here for loop compensation purposes.
These pads can be used to ground the SYNC input when the synchronization feature is not
being used. The pad connected to the SYNC input can be used to connect the
synchronization signal. The evaluation board has a 0
jumper placed here to ground the
SYNC input.
A resistor is also placed here for loop compensation purposes. This resistor and the
capacitor placed at CC create an integrator zero.
A resistor placed here adjusts the switching frequency up from the nominal 90 kHz. No
component is placed here for applications switching at 90 kHz.
Resistors placed here program the sleep-in threshold.
Resistors placed here program the sleep-out threshold.
C1, C2, C3, and C4
C5
C6
1
C9
1
C10
CB
CC
1
1
1
CIN1 and CIN2
COUT1, COUT2, and COUT3
CSS
CVDD
L1
R1
R2
R3
R4
2
3
1
1
1
1
1
1
1
RC
1
RFA
1
RSIA and RSIC
RSOA and RSOC
2
2
TABLE 2. Components for Two Typical 90 kHz Application Circuits
Input Voltage
Applicable Cell Stacks
Output
Input Filter Capacitors C1,
C2, and C6
Bootstrap Capacitor CB
Soft-start Capacitor CSS
VDD Bypass Capacitor
CVDD
Input Bulk Capacitors CIN1
and CIN2
Inductor L1
Output Capacitors COUT1,
COUT2, and COUT3
Feedback Resistors R1 and
R2
7 to 18V IN
8- to 12-Cell NiCd or NiMH, 3- to 4-Cell Li Ion, 8- to 11-Cell Alkaline, 6-Cell Lead Acid
5V, 3A Out
0.1 μF ceramic chip capacitor
3.3V, 3A Out
0.1 μF ceramic chip capacitor
0.1 μF ceramic chip capacitor
0.01 μF ceramic chip capacitor
0.2 μF ceramic chip capacitor
0.1 μF ceramic chip capacitor
0.01 μF ceramic chip capacitor
0.2 μF ceramic chip capacitor
22 μF, 35V AVX TPS Series or Sprague 593D
Series tantalum chip capacitor
40 μH (See Table 3.)
220 μF, 10V AVX TPS Series or Sprague
593D Series tantalum chip capacitor
R1 = 75 k
, 1%, R2 = 24.9 k
, 1%
22 μF, 35V AVX TPS Series or Sprague 593D
Series tantalum chip capacitor
33 μH (See Table 3.)
220 μF, 10V AVX TPS Series or Sprague
593D Series tantalum chip capacitor
R1 = 41.2 k
, 1%, R2 = 24.9 k
, 1%
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