PIC16F1847-I/SO Microchip Technology, PIC16F1847-I/SO Datasheet - Page 217
PIC16F1847-I/SO
Manufacturer Part Number
PIC16F1847-I/SO
Description
14 KB Flash, 1K Bytes RAM, 32 MHz Int. Osc, 16 I/0, Enhanced Mid Range Core 18 S
Manufacturer
Microchip Technology
Datasheets
1.PIC16F1847-ISO.pdf
(408 pages)
2.PIC16F1847-ISO.pdf
(408 pages)
3.PIC16F1847-ISO.pdf
(10 pages)
Specifications of PIC16F1847-I/SO
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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Part Number:
PIC16F1847-I/SO
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24.4.1
In Half-Bridge mode, two pins are used as outputs to
drive push-pull loads. The PWM output signal is output
on the CCPx/PxA pin, while the complementary PWM
output signal is output on the PxB pin (see
Figure
applications, as shown in
applications, where four power switches are being
modulated with two PWM signals.
In Half-Bridge mode, the programmable dead-band delay
can be used to prevent shoot-through current in
Half-Bridge power devices. The value of the PDC<6:0>
bits of the PWMxCON register sets the number of
instruction cycles before the output is driven active. If the
value is greater than the duty cycle, the corresponding
output remains inactive during the entire cycle. See
Section 24.4.5 “Programmable Dead-Band Delay
Mode”
operations.
FIGURE 24-9:
2011 Microchip Technology Inc.
Standard Half-Bridge Circuit (“Push-Pull”)
Half-Bridge Output Driving a Full-Bridge Circuit
24-9). This mode can be used for Half-Bridge
for more details of the dead-band delay
HALF-BRIDGE MODE
EXAMPLE OF HALF-BRIDGE APPLICATIONS
Figure
PxA
PxB
24-9, or for Full-Bridge
PxA
PxB
FET
Driver
FET
Driver
Preliminary
FET
Driver
FET
Driver
Since the PxA and PxB outputs are multiplexed with the
PORT data latches, the associated TRIS bits must be
cleared to configure PxA and PxB as outputs.
FIGURE 24-8:
PxA
PxB
td = Dead-Band Delay
Note 1: At this time, the TMRx register is equal to the
Load
V+
(2)
(2)
2: Output signals are shown as active-high.
(1)
td
PRx register.
Pulse Width
Load
Period
PIC16(L)F1847
td
FET
Driver
FET
Driver
EXAMPLE OF
HALF-BRIDGE PWM
OUTPUT
+
-
+
-
(1)
DS41453A-page 217
Period
(1)
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