Microchip Technology dsPIC33CH User Manual

dsPIC33CH Curiosity Development Board User’s Guide DS50002762A-page 24
Advance Information
 2018 Microchip Technology Inc.
FIGURE A-3: dsPIC33CH CURIOSITY BOARD LAYOUT SCHEMATIC REV. 1.0 (SHEET THREE OF FOUR)
Designed with
Altium.com
1k
0603
1%
R54
100R
0603
1%
R56
RC15_S1PWM7L
3V3
TP LOOP Black
DNP
TP5
1
2
J10
Pole at ~ 15.9 kHz (J10 Open)
Pole at ~ 1.45 kHz (J10 Closed)
10 μF
25V
0805
C34
10 μF
25V
0805
C35
R S X 1 0 1 MM- 30 T R
D5
10 μF
25V
0805
C36
4.7k
1%
R70
4.7k
1%
R80
Resistor Gain (J13 Closed) = 0.5481 (1.470 mV/ADC LSB at 12-bit, 3.3 VREF)
1k
1%
R57
VOUT_FB
1
2
J13
1k
0603
1%
R72
Resistor Gain (J13 Open) = 0.1754 (4.592 mV/ADC LSB at 12-bit, 3.3 VREF)
3V3
100R
0603
1%
R55
1k
0603
1%
R85
470R
0603
1%
R83
1k
0603
1%
R79
1
3
2
MMBT3904
Q9
100R
0603 1%
R87
S1PWM2L_DAC_ISET
VOUT
0.010 μF 25V
0603
C40
2.2k
0603
1%
R84
S1PWM2L DAC/DC Bias Generator/RC Filter
On-time restrictor
sub-circuit
Adjustable constant-current transient load
Note: Q8 is driven in the linear region.
Limit (peak power) * (on-time) product to
maintain peak Q8 juntion temp <150°C.
0.010 μF
25V
0603
C26
4
1,2,3
5,6,7,8
MCP87130T
Q8
1
3
2
MMBT3904
Q10
10k
1%
R88
20k
0603
1%
R90
20k
0603
1%
R91
MMBD914
D6
10k
1%
R89
Transient Load Tester Circuit
1R
1206
1%
1/4W
R94
1R
1206
1%
1/4W
R9 3
1R
1206
1%
1/4W
R9 2
1R
1206
1%
1/4W
R59
1R
1206
1%
1/4W
R74
10 μF
25V
0805
C42
DNP
C44
DNP
C43
DNP
R86
0603
DNP
C3 8
100R
0603
1%
R9 5
0.1 μF
25V
C25
0.1 μF 25V
0603
C37
0.1 μF
25V
0603
C41
16V
1 μF
0603
C51
100R
0603
1%
R52
330R
1%
R98
DNP
C46
470R
0603
1%
R103
0603
DNP
C52
100R
0603
1%
R61
High-side current sense level shifter
Output voltage feedback circuit
Buck mode low-side o-time current
sense (Note: 0.0V to -300 mV signal,
suggest -8x PGA gain)
For Buck Mode: PWM Q6, Drive Q2 DC OFF
For Boost Mode: Drive Q6 DC OFF (logic high or tri-state), PWM Q2
For Buck/Boost Mode: PWM Q6 and Q2 with s ame s
ignal
(Note: Q6 drive should be active-low, Q2 active-high)
Congurable Buck, Boost or Buck/Boost Test Circuit
Input voltage mo nitoring
4
1,2,3
5,6,7,8
MCP87130T
Q2
3V3
0R
0603
R60
+A
3
-A
2
OUTA
1
A
A
V SS
4
V DD
8
MCP6292
U7A
0.1 μF
25V
0603
C21
0.1 μF 25V
0603
C24
+A
3
-A
4
OUTA
1
V SS
2
V DD
5
MCP6001
U8
5V
5V
5V
5V
330R
1%
R15
5V
1R
1206
1%
1/4W
R6 3
BAT54
D9
+B
5
-B
6
OUTB
7
B
MCP6292
U7B
BAT54
D8
1
3
2
MMBT3904
Q7
VOUT
0.010 μF
25V 0603
C15
10k
1%
R65
270R
1%
R66
0.010 μF
25V
0603
C22
20k
0603
1%
R67
1
2
3
MMBT3906
Q11
5V
1k
0603
1%
R68
DNP
C45
DNP
R71
DNP
R69
Hardware overcurrent
protection (useful during
firmware development)
Output overvoltage protection (useful
during firmware development)
ISE NSEH
10 μF
25V
0805
C47
VOUT
GND
2
I0
3
Y
4
Vcc
5
I2
6
I1
1
NC7SZ58P6X
U10
5V
Configure d a s : Sc hmitt OR
C onfigured as: Schmitt AND
3
1
2
RZM001P02T2L
Q1
GND
2
I0
3
Y
4
VCC
5
I2
6
I1
1
NC7SZ57P6X
U5
3V3
3V3
ISE NSEH_BIASED
RD14_ISENSEL
RA3_ISENSEH
RA1_VINSENSE
RA2_TRANSIENTFB
12
DNP
J19
5V
RC14_S 1PWM7H
820R
1%
R58
RC5_S1PWM2L
S1 P W M 2 L _ DA C _ I S E T
RC13_T RANSIENT
RC0_PWMDACFB
VOUT
Net T ie
NT5
1
2
DNP
J14
R SX101MM-30TR
D2
10 μF
25V
0805
C53
10 μF
25V
0805
C55
10k
1%
R82
5V
1 2
TERMINAL 1x2
J21
VOUT
20R
0805
1%
R96
10k
1%
R102
150R
0603
1%
R97
ISE NSEH_BIASED
ISE NSEH
10k
1%
R64
RC1_VOUTFB
0.010 μF
25V
0603
C54
100 μF
25V
C57
Low ESR
Scre w
3
1
2
BSS30 8PE
Q6
33 μH
L1
_J10
_J13
270R
1%
R62
Designed with
Altium.com

Microchip Technology dsPIC33CH Specifications

General

Brand	Microchip Technology
Model	dsPIC33CH
Category	Motherboard
Language	English