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参数资料
| 型号： | MAX5053BEUA+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 12/13页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BST ISO PWM 8-UMAX |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 290kHz |
| 占空比： | 76% |
| 电源电压： | 10.8 V ~ 24 V |
| 降压： | 无 |
| 升压： | 是 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 包装： | 带卷 (TR) |
Current-Mode PWM Controllers with an Error
Amplifier for Isolated/Nonisolated Power Supplies
Functional Diagram
V IN
V IN
IN
V CC
V CC
CLAMP
26.1V
REGULATOR
BOOTSTRAP UVLO
REG_OK
V L
UVLO
COMP
DIGITAL
SOFT-START
REFERENCE
1.23V
21.6V
9.74V
1.28V
1.23V
**
UVLO
S
(INTERNAL 5.25V SUPPLY)
DRIVER
FB
ERROR
AMP
R
Q
NDRV
CS
1.4V
VO PWM
CPWM
OSCILLATOR
262kHz*
THERMAL
SHUTDOWN
GND
V CS
0.3V
ILIM
MAX5052/MAX5053
*MAX5052A/MAX5053A: 50% MAXIMUM DUTY CYCLE,
MAX5052B/MAX5053B: 75% MAXIMUM DUTY CYCLE.
**MAX5052 ONLY.
Typical Operating Circuit
Selector Guide
V SUPPLY
R1
C5
D4
R7
R2
D1
T1
D2
C4
V OUT
PART
MAX5052A
MAX5052B
MAX5053A
BOOTSTRAP
UVLO
Yes
Yes
No
STARTUP
VOLTAGE
22V
22 V
10.8V*
MAX DUTY
CYCLE
50%
75%
50%
Q1
MAX5053B
No
10.8V*
75%
V IN
NDRV
R5
C1
C2
C3
V CC MAX5052
COMP
CS
GND
R4
* The MAX5053 does not have an internal bootstrap UVLO. The
MAX5053 starts operation as long as the V CC pin is higher than
7V (the guaranteed output with a V IN pin voltage of 10.8V) and
the UVLO/EN pin is high.
0V
R6
FB
UVLO/EN
R3
12
______________________________________________________________________________________
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|---|---|
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