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参数资料
| 型号： | MCP1653ST-E/UN |
| 厂商： | Microchip Technology |
| 文件页数： | 15/28页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BST FLYBK CM 10MSOP |
| 标准包装： | 2,500 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 850kHz |
| 占空比： | 80% |
| 电源电压： | 2.7 V ~ 5.5 V |
| 降压： | 无 |
| 升压： | 是 |
| 回扫： | 是 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 包装： | 带卷 (TR) |
| 配用： | MCP1650EV-ND - BOARD EVAL FOR MCP1650,51,52,53 MCP1650DM-LED1-ND - BOARD DEMO FOR MCP165X |
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MCP1650/51/52/53
5.0
APPLICATION CIRCUITS/
ISSUES
5.1.1
NON-BOOTSTRAP BOOST
APPLICATIONS
Non-bootstrap applications are typically used when the
5.1 Typical Applications
The MCP1650/51/52/53 boost controller can be used in
several different configurations and in many different
applications. For applications that require minimum
space, low cost and high efficiency, the MCP1650/51/
52/53 product family is a good choice. It can be used in
boost, buck-boost, Single-Ended Primary Inductive
Converters (SEPIC), as well as in flyback converter
topologies.
output voltage is boosted to a voltage that is higher
than the rated voltage of the MCP1650/51/52/53. For
non-bootstrap applications, the input voltage is
connected to the boost inductor through the optional
current sense resistor and the V IN pin of the MCP1650/
51/52/53. For this type of application, the S-option
devices (UVLO at 2.55V, typical) should be used. The
gated oscillator duty cycle will be dependant on the
value of the voltage on V IN . If V IN > 3.8V, the duty cycle
will be 56%. If V IN < 3.8V, the duty cycle will be 80%.
In non-bootstrap applications, output voltages of over
100V can be generated. Even though the MCP1650/
51/52/53 device is not connected to the high boost
output voltage, the drain of the external MOSFET and
reverse voltage of the external Schottky diode are
connected. The output voltage capacitor must also be
rated for the output voltage.
3.3V to 12V 100 mA Boost Converter
V IN
8
R SENSE
0.05 ?
3
CS
Boost
Inductor
3.3 μH
MOSFET/Schottky
Combination Device
V OUT = 12V
I OUT = 0 to 100 mA
2
5
1
Input
Voltage
3.3V ±10%
C IN
10 μF
o ff
o n
GND
SHDN
NC 6
MCP1650
EXT
FB
4
7 NC
90.9 k ?
C OUT
10 μF
Ceramic
10 k ?
FIGURE 5-1:
Typical Non-Bootstrap Application Circuit (MCP1650/51/52/53).
? 2004 Microchip Technology Inc.
DS21876A-page 15
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