|
|
PDF MCP1661 Data sheet ( Hoja de datos )
| Número de pieza | MCP1661 | |
| Descripción | High-Voltage Integrated Switch PWM Boost Regulator | |
| Fabricantes | Microchip | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de MCP1661 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
|
No Preview Available !
MCP1661
High-Voltage Integrated Switch PWM Boost Regulator with UVLO
Features
• 36V, 800 m Integrated Switch
• Up to 92% Efficiency
• High Output Voltage Range: up to 32V
• 1.3A Peak Input Current Limit:
- IOUT > 200 mA @ 5.0V VIN, 12V VOUT
- IOUT > 125 mA @ 3.3V VIN, 12V VOUT
- IOUT > 100 mA @ 4.2V VIN, 24V VOUT
• Input Voltage Range: 2.4V to 5.5V
• Undervoltage Lockout (UVLO):
- UVLO @ VIN Rising: 2.3V, typical
- UVLO @ VIN Falling: 1.85V, typical
• No Load Input Current: 250 µA, typical
• Sleep mode with 200 nA Typical Quiescent
Current
• PWM Operation with Skip mode: 500 kHz
• Feedback Voltage Reference: VFB = 1.227V
• Cycle-by-Cycle Current Limiting
• Internal Compensation
• Inrush Current Limiting and Internal Soft Start
• Output Overvoltage Protection (OVP) in the event
of:
- Feedback pin shorted to GND
- Disconnected feedback divider
• Overtemperature Protection
• Easily Configurable for SEPIC or Flyback
Topologies
• Available Packages:
- 5-Lead SOT-23
- 8-Lead 2x3 TDFN
Applications
• Two and Three-Cell Alkaline, Lithium Ultimate and
NiMH/NiCd Portable Products
• Single-Cell Li-Ion to 5V, 12V or 24V Converters
• LCD Bias Supply for Portable Applications
• Camera Phone Flash
• Portable Medical Equipment
• Hand-Held Instruments
• Single-Cell Li-Ion to 3.0V or 3.3V SEPIC
Applications (see Figure 6-3)
General Description
The MCP1661 device is a compact, high-efficiency,
fixed-frequency, non-synchronous step-up DC-DC
converter which integrates a 36V, 800 m NMOS
switch. It provides a space-efficient high-voltage
step-up power supply solution for applications powered
by either two-cell or three-cell alkaline, Ultimate Lithium,
NiCd, NiMH, one-cell Li-Ion or Li-Polymer batteries.
The integrated switch is protected by the 1.3A
cycle-by-cycle inductor peak current limit operation.
There is an output overvoltage protection which turns
off switching in case the feedback resistors are
accidentally disconnected or the feedback pin is
short-circuited to GND.
Low-voltage technology allows the regulator to start-up
without high inrush current or output voltage overshoot
from a low-voltage input. The device features a UVLO
which avoids start-up and operation with low inputs or
discharged batteries for two cell-powered applications.
For standby applications (EN = GND), the device stops
switching, enters Sleep mode and consumes 200 nA
(typical) of input current.
MCP1661 is easy to use and allows creating classic
boost, SEPIC or flyback DC-DC converters within a
small Printed Circuit Board (PCB) area. All
compensation and protection circuitry is integrated to
minimize the number of external components. Ceramic
input and output capacitors are used.
Package Types
MCP1661
SOT-23
SW 1
GND 2
VFB 3
5 VIN
4 EN
MCP1661
2x3 TDFN*
VFB 1
8 EN
SGND 2 EP 7 PGND
SW 3 9 6 NC
NC 4
5 VIN
* Includes Exposed Thermal Pad (EP); see Table 3-1.
2014-2015 Microchip Technology Inc.
DS20005315B-page 1
1 page  
MCP1661
2.0 TYPICAL PERFORMANCE CURVES
Note:
The graphs and tables provided following this note are a statistical summary based on a limited number of
samples and are provided for informational purposes only. The performance characteristics listed herein
are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified
operating range (e.g., outside specified power supply range) and therefore outside the warranted range.
Note: Unless otherwise indicated, VIN = 3.3V, IOUT = 20 mA, VOUT = 12V, CIN = COUT = 10 µF, X7R ceramic,
L = 4.7 µH, TA = 25°C, 5-lead SOT-23 package.
2.3
UVLO Start
2.2
2.1
2
1.9 UVLO Stop
1.8
1.7
-40 -25 -10 5 20 35 50 65 80 95 110 125
Ambient Temperature (°C)
FIGURE 2-1:
Undervoltage Lockout
(UVLO) vs. Ambient Temperature.
100
90
VOUT = 9.0V
L = 4.7 μH
80
70
60
50
40
30
20
0.1
1
FIGURE 2-4:
IOUT.
VIN = 5.5V
VIN = 2.3V VIN = 3.0V VIN = 4.0V
10
IOUT (mA)
100
1000
9.0V VOUT Efficiency vs.
1.230
1.225
1.220
1.215
1.210
-40 -25 -10 5 20 35 50 65 80 95 110 125
Ambient Temperature (°C)
FIGURE 2-2:
VFB Voltage vs. Ambient
Temperature and VIN.
100
VOUT = 12.0V
90 L = 4.7 μH
80
70
60
50
40
30
20
0.1
1
FIGURE 2-5:
IOUT.
VIN = 4.0V
VIN = 5.5V
VIN = 2.3V
VIN = 3.0V
10 100 1000
IOUT (mA)
12.0V VOUT Efficiency vs.
1000
900
800
L = 4.7 μH, VOUT = 6V, 9V and 12V
L = 10 μH, VOUT = 24V
700
600
500
VOUT = 6.0V
400
300
VOUT = 9.0V
VOUT = 12V
200
100
0
VOUT = 24V
2.3 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
VIN (V)
FIGURE 2-3:
vs. VIN.
Maximum Output Current
100
90
VOUT = 24.0V
L = 10 μH
80
70
60
50
40
30
20
0.1
1
FIGURE 2-6:
IOUT.
VIN = 5.5V
VIN = 3.0V
VIN = 4.0V
10
IOUT (mA)
100
1000
24.0V VOUT Efficiency vs.
2014-2015 Microchip Technology Inc.
DS20005315B-page 5
5 Page 
4.0 DETAILED DESCRIPTION
4.1 Device Overview
MCP1661 is a constant frequency PWM boost (step-up)
converter, based on a peak current mode architecture
which delivers high efficiency over a wide load range
from two-cell and three-cell Alkaline, Ultimate Lithium,
NiMH, NiCd and single-cell Li-Ion battery inputs. A high
level of integration lowers total system cost, eases
implementation and reduces board area.
The device features controlled start-up voltage
(UVLO), adjustable output voltage, 500 kHz PWM
operation with Skipping mode, 36V integrated switch,
internal compensation, inrush current limit, soft start,
and overvoltage protection in case the VFB connection
is lost.
The 800 m, 36V integrated switch is protected by the
1.3A cycle-by-cycle inductor peak current operation.
When the Enable pin is pulled to ground (EN = GND),
the device stops switching, enters in Shutdown mode
and consumes approximately 200 nA of input current
(the feedback current is not included).
MCP1661 can be used to build classic boost, SEPIC or
flyback DC-DC converters.
MCP1661
2014-2015 Microchip Technology Inc.
DS20005315B-page 11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet MCP1661.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| MCP1661 | High-Voltage Integrated Switch PWM Boost Regulator | Microchip |
| MCP1662 | High-Voltage Step-Up LED Driver | Microchip |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |