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參數(shù)資料
| 型號： | L6615N |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDIP8 |
| 封裝： | MINI, DIP-8 |
| 文件頁數(shù)： | 6/20頁 |
| 文件大?。?/td> | 394K |
| 代理商： | L6615N |
L6615
14/20
Figure 13. Current sense methods.
6
APPLICATION IDEAS
In fig. 14 is showed a single section of a system in which several DC to DC modules can be paralleled,
typical solution whenever the load requires high current at low voltage; the converter is designed for a step
down configuration using a synchronous rectification controller (for example L6910 [1] or L6911 [2] ST de-
vice).
The L6615 reads the drop across the Rds(ON) of the OR-ing FET and the LM293 drives its gate, pulling
it down whenever a fault condition (e.g. short on the low side) appears.
A charge pump could be necessary to be sure that the ORing FET VGS is higher than VGS(TH) (depending
on the input and output voltage).
Figure 14. 0.9 to 5V DC-Dc converter with Current Sharing and output hot-pluggability
a)
b)
c)
GATE
CONTROL
I
OUT
R
G
R
G
CS+
CS-
L6615
ORing FET
L
O
A
D
I
OUT
R
G
R
G
CS+
CS-
L6615
POWER
SUPPLY
L
O
A
D
R
SNS
POWER
SUPPLY
L
O
A
D
CS+
CS-
L6615
R
SNS
R
G
R
G
I
OUT
1:N
SENSING
CIRCUIT
1:N
GATE
CONTROL
I
OUT
R
G
R
G
CS+
CS-
L6615
ORing FET
L
O
A
D
I
OUT
R
G
R
G
CS+
CS-
L6615
POWER
SUPPLY
L
O
A
D
R
SNS
POWER
SUPPLY
L
O
A
D
CS+
CS-
L6615
R
SNS
R
G
R
G
I
OUT
1:N
SENSING
CIRCUIT
1:N
-SOUT
VOUT
P_GND
VIN
SH
VFB
COMP
BOOT
PGND
6
LM293
4
5
8
7
CS+
CS-
L6615
ADJ
COMP
CGA
GND
+S_OUT
VIN
GND
SS
LGATE
UGATE
PHASE
VCC
Vcc
SH
Q1
R1
L6910
-SOUT
VOUT
P_GND
VIN
SH
VFB
COMP
BOOT
PGND
6
LM293
4
5
8
7
CS+
CS-
L6615
ADJ
COMP
CGA
GND
+S_OUT
VIN
GND
SS
LGATE
UGATE
PHASE
VCC
Vcc
SH
Q1
R1
L6910
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參數(shù)描述 |
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| L6668 | 功能描述:電流型 PWM 控制器 SMART PRIMARY CONTROLLER RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
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