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參數(shù)資料
| 型號(hào)： | MAX1856 |
| 廠商： | Maxim Integrated Products, Inc. |
| 元件分類： | 數(shù)字信號(hào)處理 |
| 英文描述： | Replaced by TMS320C6202B : Fixed-Point Digital Signal Processor 352-FCBGA |
| 中文描述： | 寬輸入范圍、可同步的、PWM SLIC電源 |
| 文件頁數(shù)： | 10/18頁 |
| 文件大小： | 594K |
| 代理商： | MAX1856 |
M
Wide Input Range, Synchronizable,
PWM SLIC Power Supply
10
______________________________________________________________________________________
cuit (Figure 1) converting a +12V input to a -72V output
(maximum load 100mA) and a -24V output (maximum
load 400mA).
Maximum Output Power
The maximum output power the MAX1856 can provide
depends on the maximum input power available and
the circuit
’
s efficiency:
Furthermore, the efficiency and input power are both
functions of component selection. Efficiency losses can
be divided into three categories: 1) resistive losses
across the transformer, MOSFET
’
s on-resistance, cur-
rent-sense resistor, and the ESR of the input and output
capacitors; 2) switching losses due to the MOSFET
’
s
transition region, the snubber circuit, which also
increases the transition times, and charging the MOS-
FET
’
s gate capacitance; and 3) transformer core loss-
es. Typically, 80% efficiency can be assumed for initial
calculations. The input power depends on the current
limit, input voltage, output voltage, inductor value, the
transformer
’
s turns ratio, and the switching frequency:
where N
P
:N
S
is the transformer
’
s turns ratio.
Setting the Operating Frequency
(SYNC/
SHDN
and FREQ)
The SYNC/
SHDN
pin provides both external-clock syn-
chronization (if desired) and shutdown control. When
SYNC/
SHDN
is low, all IC functions are shut down. A
logic high at SYNC/
SHDN
selects operation at a
P
V D
V
R
V D
OSC
2
L
D
N V
N V
N V
IN MAX
(
CS
CS
)
=
=
+
P
EFFICIENCY
P
OUT MAX
(
IN MAX
(
)
)
×
=
R3
276k
R2
276k
R1
552k
V
REF
1.25V
I
MAX
I
MIN
100mV
MUX
0
1
X6
X1
X1
Q
S
R
MUX
0
1
2
7
8
1
10
MAX1856
ANTISAT
SLOPE COMP
REF
9
4
5
6
3
LDO
EXT
PGND
FREQ
FB
CS
F
OSC
1.0V
F
OSC
/3
V
CC
BIAS
SYNC/SHDN
GND
15mV
Figure 2. Functional Diagram
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX1856EUB | Replaced by TMS320C6202B : Fixed-Point Digital Signal Processor 352-FCBGA 0 to 0 |
| MAX1864 | Fixed-Point Digital Signal Processor 352-FCBGA |
| MAX1864-MAX1865 | Fixed-Point Digital Signal Processor 384-FC/CSP |
| MAX1865 | Fixed-Point Digital Signal Processor 352-FCBGA |
| MAX1864UEEE | xDSL/Cable Modem Triple/Quintuple Output Power Supplies |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1856EUB | 功能描述:電信線路管理 IC RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray |
| MAX1856EUB+ | 功能描述:電信線路管理 IC Synchronizable PWM SLIC Power Supply RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray |
| MAX1856EUB+T | 功能描述:電信線路管理 IC Synchronizable PWM SLIC Power Supply RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray |
| MAX1856EUB-T | 功能描述:電信線路管理 IC RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray |
| MAX1856EVKIT | 功能描述:電源管理IC開發(fā)工具 Evaluation Kit for the MAX1856 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 |
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