參數(shù)資料
型號(hào): MAX1854
廠商: Maxim Integrated Products, Inc.
英文描述: High-Speed, Adjustable, Synchronous Step-Down Controllers with Integrated Voltage Positioning
中文描述: 高速、數(shù)字可調(diào)、同步降壓型控制器,集成電壓定位電路
文件頁(yè)數(shù): 16/33頁(yè)
文件大?。?/td> 840K
代理商: MAX1854
M
High-Speed, Adjustable, Synchronous Step-Down
Controllers with Integrated Voltage Positioning
16
______________________________________________________________________________________
Figure 2. Functional Diagram
REF
-10%
FROM
OUT
REF
7R
R
D0
ERROR
AMP
TOFF
1-SHOT
TON
REF
+10%
CHIP
SUPPLY
x2
SHDN
VPS
CC
VGATE
*
NO OVERVOLTAGE PROTECTION ON THE MAX1854
D1
D2
D3
D4
ON-TIME
COMPUTE
1-SHOT
TRIG
IN
2V TO 28V
TRIG
Q
Q
S
R
2V
REF
R-2R
DAC
REF
REF
PGND
+5V
OUTPUT
CS
DL
CS
V
CC
V
DD
LX
ZERO CROSSING
CURRENT
LIMIT
DH
BST
9R
R
I
LIM
+5V
+5V
Q
SKIP
TON
V+
Σ
MAX1716
MAX1854
MAX1855
S
R
Q
OVP/UVP
DETECT
*
200k
gm
FB
TON SETTING
(kHz)
K-FACTOR
(
μ
s)
5
3.3
2.2
1.8
APPROXIMATE
K-FACTOR ERROR (%)
MIN RECOMMENDED V
BATT
AT
V
OUT
= 1.6V (V)
2.04
2.28
2.84
3.55
200
300
400
550
±
9
±
11
±
15
±
20
Table 3. Approximate K-Factor Errors
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