- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄69008 > LTM4600HVEV#TRPBF (LINEAR TECHNOLOGY CORP) 17 A SWITCHING REGULATOR, BGA104 PDF資料下載
參數(shù)資料
| 型號： | LTM4600HVEV#TRPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 17 A SWITCHING REGULATOR, BGA104 |
| 封裝： | 15 X 15 MM, ROHS COMPLIANT, MO-222, LGA-104 |
| 文件頁數(shù)： | 4/24頁 |
| 文件大?。?/td> | 351K |
| 代理商： | LTM4600HVEV#TRPBF |
LTM4600HV
12
4600hvfd
After the controller has been started and given adequate
time to charge up the output capacitor, CSS is used as a
short-circuit timer. After the RUN/SS pin charges above 4V,
if the output voltage falls below 75% of its regulated value,
then a short-circuit fault is assumed. A 1.8μA current then
begins discharging CSS. If the fault condition persists until
the RUN/SS pin drops to 3.5V, then the controller turns
off both power MOSFETs, shuting down the converter
permanently. The RUN/SS pin must be actively pulled
down to ground in order to restart operation.
The over-current protection timer requires the soft-start
timing capacitor CSS be made large enough to guarantee
that the output is in regulation by the time CSS has reached
the 4V threshold. In general, this will depend upon the size
of the output capacitance, output voltage and load current
characteristic. A minimum external soft-start capacitor
can be estimated from:
CSS_EXT + 1000pF >COUT VOUT(10
–3[F / V
S])
Generally 0.1μF is more than sufcient.
Since the load current is already limited by the current
mode control and current foldback circuitry during a
shortcircuit, over-current latchoff operation is NOT always
needed or desired, especially the output has large amount
of capacitance or the load draw huge current during start
up. The latchoff feature can be overridden by a pull-up
current greater than 5μA but less than 80μA to the RUN/SS
pin. The additional current prevents the discharge of CSS
during a fault and also shortens the soft-start period. Us-
ing a resistor from RUN/SS pin to VIN is a simple solution
VIN
RRUN/SS
RUN/SS
4600hv F04
LTM4600HV
PGND SGND
VIN
4.5V TO 5.5V
10.8V TO 13.8V
24V TO 28V
RRUN/SS
50k
150k
500k
RECOMMENDED VALUES FOR RUN/SS
Figure 4. Defeat Short-Circuit Latchoff with a Pull-Up
Resistor to VIN
Figure 3. RUN/SS Pin Voltage During Startup and
Short-Circuit Protection
VRUN/SS
3.5V
t
75%VO
SWITCHING
STARTS
SOFT-START
CLAMPING
OF IL RELEASED
SHORT-CIRCUIT
LATCHOFF
OUTPUT
OVERLOAD
HAPPENS
SHORT-CIRCUIT
LATCH ARMED
4V
3V
1.5V
4600hv F03
VO
to defeat latchoff. Any pull-up network must be able to
maintain RUN/SS above 4V maximum latchoff threshold
and overcome the 4μA maximum discharge current. Figure
3 shows a conceptual drawing of VRUN during startup and
short circuit.
APPLICATIONS INFORMATION
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LV5682P | 1-CHANNEL POWER SUPPLY SUPPORT CKT, ZFM25 |
| LV8051PL | BRUSH DC MOTOR CONTROLLER, 0.6 A, QCC32 |
| LV8051PL | BRUSH DC MOTOR CONTROLLER, 0.6 A, QCC32 |
| LV8112V | BRUSHLESS DC MOTOR CONTROLLER, 3 A, PDSO44 |
| LV8711T | STEPPER MOTOR CONTROLLER, 1 A, PDSO24 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTM4600HVIV | 制造商:LINER 制造商全稱:Linear Technology 功能描述:10A, 28VIN High Effi ciency DC/DC μModule |
| LTM4600HVIV#PBF | 功能描述:IC DC/DC UMODULE 10A 104-LGA RoHS:是 類別:電源 - 板載 >> DC DC Converters 系列:µModule® 設(shè)計資源:VI-200, VI-J00 Design Guide, Appl Manual 標(biāo)準包裝:1 系列:* 類型:隔離 輸出數(shù):1 電壓 - 輸入（最?。?66V 電壓 - 輸入（最大）:160V Voltage - Output 1:12V Voltage - Output 2:- Voltage - Output 3:- 電流 - 輸出（最大）:* 電源（瓦） - 制造商系列:50W 電壓 - 隔離:* 特點:* 安裝類型:通孔 封裝/外殼:9-FinMod 尺寸/尺寸:4.60" L x 1.86" W x 0.79" H（116.8mm x 47.2mm x 20.1mm） 包裝:散裝 工作溫度:-25°C ~ 85°C 效率:* 電源（瓦特）- 最大:* |
| LTM4600HVIV-PBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:10A, 28VIN High Effi ciency DC/DC μModule |
| LTM4600HVIV-TRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:10A, 28VIN High Effi ciency DC/DC μModule |
| LTM4600HVMP | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Low VIN, 8A DC/DC Module Regulator with Tracking, Margining, and Frequency Synchronization |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。