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| 型号： | MCP1630VT-E/MC |
| 厂商： | Microchip Technology |
| 文件页数： | 11/26页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BST FLYBK ISO 8-DFN |
| 标准包装： | 3,300 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 1MHz |
| 占空比： | 75% |
| 电源电压： | 3 V ~ 5.5 V |
| 降压： | 是 |
| 升压： | 是 |
| 回扫： | 是 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 是 |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 8-VFDFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 配用： | MCP1630DM-LED2-ND - BOARD DEM MCP1630 BOOST MODE LED MCP1630RD-NMC1-ND - REF DESIGN MCP1630 NIMH BATT CHG MCP1630RD-DDBK3-ND - REF DESIGN MCP1630V BI-DIR 4CELL MCP1630DM-DDBK4-ND - BOARD CONV DEMO MCP1630 TRPL-OUT MCP1630DM-DDBS2-ND - BOARD DEMO BOOST COUPLED INDUCTR MCP1630DM-DDBS1-ND - BOARD DEMO BOOST AUTO INPUT MCP1630DM-NMC1-ND - BOARD DEMO FOR MCP1630 |
MCP1630/MCP1630V
3.0
MCP1630 PIN DESCRIPTIONS
TABLE 3-1:
PIN FUNCTION TABLE
DFN/MSOP
1
2
3
4
5
6
7
8
Name
COMP
FB
CS
OSC IN
GND
V EXT
V IN
V REF
Function
Error Amplifier Output pin
Error Amplifier Inverting Input
Current Sense Input pin (MCP1630) or Voltage Ramp Input pin (MCP1630V)
Oscillator Input pin
Circuit Ground pin
External Driver Output pin
Input Bias pin
Reference Voltage Input pin
3.1
Error Amplifier Output Pin (COMP)
low. The high-to-low transition initiates the start of a
COMP is an internal error amplifier output pin. External
compensation is connected from the FB pin to the
COMP pin for control-loop stabilization. An internal
voltage clamp is used to limit the maximum COMP pin
voltage to 2.7V (typ.). This clamp is used to set the
new cycle. The duty cycle of the OSC input pin deter-
mines the maximum duty cycle of the power converter.
For example, if the OSC input is low for 75% of the time
and high for 25% of the time, the duty cycle range for
the power converter is 0% to 75% maximum.
maximum peak current in the power system switch by
setting a maximum limit on the CS input for Peak
3.5
Ground (GND)
Current mode control systems.
Connect the circuit ground to the GND pin. For most
3.2
Error Amplifier Inverting Input
applications, this should be connected to the analog or
quiet ground plane. Noise on this ground can affect the
(FB)
FB is an internal error amplifier inverting input pin. The
sensitive cycle-by-cycle comparison between the CS
input and the error amplifier output.
output (voltage or current) is sensed and fed back to
the FB pin for regulation. Inverting or negative
3.6
External Driver Output Pin (V EXT )
feedback is used.
V EXT is an external driver output pin, used to determine
3.3
Current Sensing Input (CS)
the power system duty cycle. For high-power or high-
side drives, this output should be connected to the logic-
CS is the current sense input pin used for cycle-by-
cycle control for Peak Current mode converters. The
MCP1630 is typically used for sensed current
level input of the MOSFET driver. For low-power, low-
side applications, the V EXT pin can be used to directly
drive the gate of an N-channel MOSFET.
applications to reduce the current sense signal, thus
reducing power dissipation.
3.7
Input Bias Pin (V IN )
For Voltage mode or Average Current mode
applications, a ramp is used to compare the error
amplifier output voltage with producing the PWM duty
cycle. For applications that require higher signal levels,
the MCP1630V is used to increase the level from a
maximum of 0.9V (MCP1630) to 2.7V (MCP1630V).
The common mode voltage range for the MCP1630V
CS input is V IN -1.4V. For normal PWM operation, the
CS input should be less than or equal to V IN - 1.4V at
all times.
V IN is an input voltage pin. Connect the input voltage
source to the V IN pin. For normal operation, the voltage
on the V IN pin should be between +3.0V and +5.5V. A
0.1 μF bypass capacitor should be connected between
the V IN pin and the GND pin.
3.8 Reference Voltage Input (V REF )
V REF is an external reference input pin used to regulate
the output of the power system. By changing the V REF
input, the output (voltage or current) of the power sys-
3.4
Oscillator Input (OSC)
tem can be changed. The reference voltage can range
OSC is an external oscillator input pin. Typically, a
microcontroller I/O pin is used to generate the OSC
input. When high, the output driver pin (V EXT ) is driven
? 2005 Microchip Technology Inc.
from 0V to V IN (rail-to-rail).
DS21896B-page 11
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