MCP1631RD-DCPC1 Microchip Technology, MCP1631RD-DCPC1 Datasheet - Page 81
MCP1631RD-DCPC1
Manufacturer Part Number
MCP1631RD-DCPC1
Description
REF DES BATT CHARG OR LED DRIVER
Manufacturer
Microchip Technology
Datasheets
1.PIC16F616T-ISL.pdf
(214 pages)
2.MCP1631VHVT-330EST.pdf
(34 pages)
3.MCP1631VHVT-330EST.pdf
(32 pages)
Specifications of MCP1631RD-DCPC1
Current - Output / Channel
700mA
Outputs And Type
1, Non-Isolated
Features
Firmware for Li-Ion, NiMH, and NiCd Battery Charger
Voltage - Input
3.5 ~ 16 V
Utilized Ic / Part
MCP1631HV, PIC16F616
Core Chip
MCP1631HV, PIC16F616
Topology
Parallel, Series
Output Current
1A
No. Of Outputs
1
Input Voltage
3.5V To 16V
Dimming Control Type
Analog
Kit Contents
Board
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Voltage - Output
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
- PIC16F616T-ISL PDF datasheet
- MCP1631VHVT-330EST PDF datasheet #2
- MCP1631VHVT-330EST PDF datasheet #3
- Current page: 81 of 214
- Download datasheet (4Mb)
9.3
For the ADC to meet its specified accuracy, the charge
holding capacitor (C
charge to the input channel voltage level. The Analog
Input model is shown in Figure 9-4. The source
impedance (R
impedance directly affect the time required to charge the
capacitor C
varies over the device voltage (V
The maximum recommended impedance for analog
sources is 10 kΩ. As the source impedance is
decreased, the acquisition time may be decreased.
After the analog input channel is selected (or changed),
an A/D acquisition must be done before the conversion
can be started. To calculate the minimum acquisition
time, Equation 9-1 may be used. This equation
assumes that 1/2 LSb error is used (1024 steps for the
ADC). The 1/2 LSb error is the maximum error allowed
for the ADC to meet its specified resolution.
EQUATION 9-1:
© 2009 Microchip Technology Inc.
Note 1: The reference voltage (V
The value for T
Solving for T
Therefore:
Assumptions:
2: The charge holding capacitor (C
3: The maximum recommended impedance for analog sources is 10 kΩ. This is required to meet the pin
A/D Acquisition Requirements
HOLD
leakage specification.
T
V
S
V
V
ACQ
T
) and the internal sampling switch (R
AP PLIE D
T
. The sampling switch (R
AP P LI ED
ACQ
AP P LIED
C
C
=
=
=
=
:
=
C
HOLD
=
=
=
ACQUISITION TIME EXAMPLE
5µs
Temperature
–
–
1.37
7.67µs
can be approximated with the following equations:
10pF 1k
⎛
⎝
C
Amplifier Settling Time
T
5µs
⎛
⎜
⎝
⎛
⎜
⎝
1
) must be allowed to fully
AMP
HOLD
1 e
1 e
+
µs
–
+
–
–
1.37µs
(
----------- -
2047
+
T
(
1
–
--------- -
R
C
–
-------- -
RC
RC
Ω
T
DD
T
Tc
IC
+
C
C
+
⎞
⎠
⎞
⎟
⎠
⎞
⎟
⎠
), see Figure 9-4.
+
+
+
[
REF
(
7k
=
Temperature - 25°C
T
=
=
[
=
R
SS
(
Ω
COFF
) has no effect on the equation, since it cancels itself out.
SS
50°C- 25°C
) impedance
50°C and external impedance of 10k
V
V
V
+
PIC16F610/616/16HV610/616
+
CHOLD
CHOLD
A P PLIE D
HOLD
10k
R
S
) ln(1/2047)
+
Ω
) is not discharged after each conversion.
SS
)
Hold Capacitor Charging Time
ln(0.0004885)
)
) 0.05µs/°C
⎛
⎝
(
1
–
) 0.05µs/°C
----------- -
2047
(
1
⎞
⎠
)
]
;[2] V
;combining [1] and [2]
;[1] V
)
]
CHOLD
CHOLD
Ω
5.0V V
+
charged to within 1/2 lsb
charge response to V
Temperature Coefficient
DD
DS41288F-page 81
APPLIED
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