参数资料
型号: ISL6551ABZ-T
厂商: Intersil
文件页数: 20/26页
文件大小: 0K
描述: IC REG CTRLR FLYBACK PWM 28-SOIC
标准包装: 1,000
PWM 型: 电流模式
输出数: 6
频率 - 最大: 1MHz
占空比: 50%
电源电压: 10.8 V ~ 13.2 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 105°C
封装/外壳: 28-SOIC(0.295",7.50mm 宽)
包装: 带卷 (TR)
ISL6551
Main Transformers
Supervisor Circuits
P+
P–
S+
S–
(1) INTEGRATED SOLUTION
? Intersil ISL6550 Supervisor And Monitor (SAM). Its QFN
package requires less space than the SOIC package.
FIGURE 18A. FULL BRIDGE AND CURRENT DOUBLER
VCC
VOPP
1
2
20 UVDLY
19 OVUVSEN
VOPM
3
18 PGOOD
PGOOD
P+
S+
V OUT F
VOPOUT
VREF5
VOPOUT
VREF5
GND
4
5
6
17 START
16 PEN
15 VID0
START
PEN
P– S–
FIGURE 18B. CONVENTIONAL FULL BRIDGE
BDAC
BDAC
OVUVTH
DACHI
7
8
9
14 VID1
13 VID2
12 VID3
DACLO 10
11 VID4
P1–
V IN F
or CURRENT_SEN_P
S+
FIGURE 19. ISL6550 SOIC
P2–
S–
? Over-temperature protection (discrete)
FIGURE 18C. PUSH-PULL AND CURRENT DOUBLER
? Input UV lockout (discrete)
(2) DISCRETE SOLUTION
P1–
V IN F
or CURRENT_SEN_P
P2–
S+
V OUT F
S–
? Differential Amplifier
? VCC undervoltage lockout
? Programmable output OV and UV
FIGURE 18D. CONVENTIONAL PUSH-PULL
Full Bridge and Current Doubler - No center tap is
required. The secondary winding carries half of the load, i.e.,
only half of the load is reflected to the primary.
Conventional Full Bridge - Center tap is required on the
secondary side, and no center tap is required on the primary
side. The secondary winding carries all the load. i.e., all the
load is reflected to the primary.
Push-Pull and Current Doubler - Center tap is required on
the primary side, and no center tap is required on the
secondary side. The secondary winding carries half of the
load, i.e., only half of the load is reflected to the primary.
Conventional Push-Pull - Both primary and secondary
sides require center taps. The secondary winding carries all
the load, i.e., all the load is reflected to the primary.
20
? Programmable output
? Status indicators (PGOOD and START)
? Precision Reference
? Ove- temperature protection
? Input UV lockout
The Integrated Solution is much simpler than a discrete
solution. Over-temperature protection and input under
voltage lockout can be added for better system protection
and performance.
The Discrete Solution requires a significant number of
components to implement the features that the ISL6550 can
provide.
FN9066.5
January 3, 2006
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