APGRD004 Microchip Technology, APGRD004 Datasheet - Page 18

• Manufacturer Part Number: APGRD004
• Description: REF DESIGN MOD AUTO AMBNT LIGHT
• Manufacturer: Microchip Technology

Specifications of APGRD004

• Main Purpose: Lighting, RGB LED Controller
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: MCP2021, PIC12F615
• Primary Attributes: 4 Tiny Boards, Each Have: RGB LED, LIN Transceiver, Voltage Regulator, MCU
• Secondary Attributes: LIN Commands are Interpreted to Control 16,383 Colors and 1,023 Dimming Levels
• Silicon Manufacturer: Microchip
• Silicon Core Number: APGDT001
• Kit Contents: 4 Ambient Lighting Modules, Documentation
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Using TC6501 Open Drain Output for
Current Set-Point Control
There are different ways that the TC6501 and TC6502
temperature sensors can be used in an application. The
open-drain output of the TC6501 is useful for controlling
signals in analog circuits. For example, the TC6501 could
be used to limit a current reference set-point for a switch-
mode power supply. It could also be connected to signals in
op amp circuits to alter the behavior of the system when a
temperature limit is exceeded (see figure below).
Using the TC6501 to Provide MCU Interrupt
If a microcontroller is present and managing the application,
a TC6502 with CMOS active-high output signal can be used
to provide an interrupt. The microcontroller in turn will be
able to apply PWM dimming techniques to reduce the power
output to the module (as shown in figure below).
Using TC6501 Open Drain Output for Current Set-Point Control
Using the TC6501 to Provide MCU Interrupt
18
LED Lighting Solutions
LED Lighting Solutions Design Guide
+5V
+5V
GND
TC6501
GND
V
CC
GND
HIST
T
TC6502
OVER
GND
V
CC
HIST
T
OVER
V
REF
GND
V
MCP1630
IN
Fan Controller Application Using TC6502
If a cooling device (fan) is available, a TC6502 device (with
the HYST pin connected to V
threshold) can directly control a cooling fan to improve the
heat transfer.
COMP
GP0
OSC IN
PIC12F683
V
GND
+5V
CS
EXT
FB
V
CC
PWM
V
HIST
CC
GND
TC6502
L
V
IN
LED
Dimming
Signal
GND
T
OVER
CC
to obtain a 10°C hysteresis
D1
Dn
www.microchip.com/lighting
+12V
Fan