Introduction

There are two versions of dingoPDM, standard and Max.

dingoPDM = 8 outputs (shown above, low and medium current)

dingoPDM-Max = 4 outputs (high current)

Components

dingoPDM

• 2x Profet BTS7002-1EPP
  • 2x 14A outputs
  • With flyback diodes
• 3x Profet BTS7008-2EPA
  • 6x 8A outputs
• 2x Digital Inputs
  • Selectable pullup/pulldown
• STM32F446RET6 Microcontroller
• 256Kbit FRAM
  • Settings storage
• CAN transceiver
  • No terminating resistor
• Board temperature measured using MCP9808
• 2x LEDs for power and temperature status
• 2x LEDs for status
• Onboard 12V to 5V to 3.3V regulation
• 2x M6 lug 12V power connection
  • Ground connection not used for output power, can be a small gauge (ex: 18AWG or 20AWG)
• 12V voltage measurement
• THT test pads for easy connection of logic analyzer (ex: Saleae leads)
• Deutsch DT 12 pin connector

dingoPDM-Max (only differences listed)

• 4x Profet BTS70012-1ESP
  • 4x 26A outputs
  • With flyback diodes

KiCad

• Designed using KiCad v8.0.4

Design Notes

• Prior to V6, the design had a lot of features which meant a lot of parts
• To make the board cheaper, easier to source/produce and quicker to test the design was drastically simplified
• The Deutsch DT connector was selected due to it's popularity, part availability and ease of use
• BTS724 was used on V6, but removed for V7 due to thermal issues. It wouldn't trip until a very high current.

MCU Pinouts

dingoPDM

MCU Pin	Function	Type
PA0	Output 1 Current Sense (IS)	Analog Input
PA1	Output 5/6 Current Sense (IS)	Analog Input
PA2	Output 7/8 Current Sense (IS)	Analog Input
PA3	Battery Voltage Sense	Analog Input
PA4	Output 8 Control Input (IN)	Digital Output
PA5	Output 7/8 Sense Select (DSEL)	Digital Output
PA6	Output 7/8 Sense Enable (DEN)	Digital Output
PA7	Output 7 Control Input (IN)	Digital Output
PA8	-	-
PA9	USB VBUS Sense	Digital Input
PA10	Input 1	Digital Input
PA11	USB D- (DM)
PA12	USB D+ (DP)
PA13	SWDIO
PA14	SWCLK
PA15	-	-
PB0	Output 5/6 Sense Enable (DEN)	Digital Output
PB1	Output 1 Control Input (IN)	Digital Output
PB2	Output 1 Sense Enable (DEN)	Digital Output
PB3	SWO
PB4	-	-
PB5	-	-
PB6	I2C1 SCL
PB7	I2C1 SDA
PB8	CAN RX
PB9	CAN TX
PB10	Output 1 Control Input (IN)	Digital Output
PB12	Output 4 Control Input (IN)	Digital Output
PB13	-	-
PB14	Output 3/4 Sense Select (DSEL)	Digital Output
PB15	Output 3/4 Sense Enable (DEN)	Digital Output
PC0	Status LED	Digital Output
PC1	Error LED	Digital Output
PC2	Output 2 Current Sense (IS)	Analog Input
PC3	Output 3/4 Current Sense (IS)	Analog Input
PC4	Output 6 Control Input (IN)	Digital Output
PC5	Output 5/6 Sense Select (DSEL)	Digital Output
PC6	Output 3 Control Input (IN)	Digital Output
PC7	Output 2 Sense Enable (DEN)	Digital Output
PC8	Output 2 Control Input (IN)	Digital Output
PC9	Input 2	Digital Input
PC10	Extra 1	Undefined
PC11	Extra 2	Undefined
PC12	CAN Standby	Digital Output
PC13	Extra 3	Undefined
PC14	-	-
PC15	-	-
PD2	-	-
PH0	Oscillator
PH1	Oscillator

dingoPDM-Max

MCU Pin	Function	Type
PA0	Output 3 Current Sense (IS)	Analog Input
PA1	Output 4 Current Sense (IS)	Analog Input
PA2	-
PA3	Battery Voltage Sense	Analog Input
PA4	-
PA5	Output 4 Sense Enable (DEN)	Digital Output
PA6	Output 4 Control Input (IN)	Digital Output
PA7	-
PA8	-	-
PA9	USB VBUS Sense	Digital Input
PA10	Input 1	Digital Input
PA11	USB D- (DM)
PA12	USB D+ (DP)
PA13	SWDIO
PA14	SWCLK
PA15	-	-
PB0	Output 3 Control Input (IN)	Digital Output
PB1	-
PB2	-
PB3	SWO
PB4	-	-
PB5	-	-
PB6	I2C1 SCL
PB7	I2C1 SDA
PB8	CAN RX
PB9	CAN TX
PB10	-
PB12	-
PB13	Output 1 Sense Enable (DEN)	Digital Output
PB14	Output 1 Control Input (IN)	Digital Output
PB15	-
PC0	Status LED	Digital Output
PC1	Error LED	Digital Output
PC2	Output 2 Current Sense (IS)	Analog Input
PC3	Output 1 Current Sense (IS)	Analog Input
PC4	-	Digital Output
PC5	Output 3 Sense Enable (DEN)	Digital Output
PC6	Output 2 Sense Enable (DEN)	Digital Output
PC7	Output 2 Control Input (IN)	Digital Output
PC8	-
PC9	Input 2	Digital Input
PC10	Extra 1	Undefined
PC11	Extra 2	Undefined
PC12	CAN Standby	Digital Output
PC13	Extra 3	Undefined
PC14	-	-
PC15	-	-
PD2	-	-
PH0	Oscillator
PH1	Oscillator