LED Driver. HT16D35A Datasheet

HT16D35A Driver. Datasheet pdf. Equivalent

HT16D35A Datasheet
Recommendation HT16D35A Datasheet
Part HT16D35A
Description RAM Mapping 28 x 8 Constant Current LED Driver
Feature HT16D35A; HT16D35A/HT16D35B RAM Mapping 28×8 Constant Current LED Driver Features • Operating voltage: 2.7V~.
Manufacture Holtek Semiconductor
Datasheet
Download HT16D35A Datasheet




Holtek Semiconductor HT16D35A
HT16D35A/HT16D35B
RAM Mapping 28×8 Constant Current LED Driver
Features
• Operating voltage: 2.7V~5.5V
• LED display: 28 rows and 8 commons
• LED data RAM1: 28×8×6 bits=1344 bits for Gray
mode
• LED data RAM2: 28×8×6 bits=1344 bits for FADE
mode
• LED data RAM3: 28×8 bits=224 bits for Binary
mode or Matrix masking
• LED data RAM4: 28×8 bits=224 bits for Universal
Segment function
• LED data RAM5: 8×8 bits=64 bits for Universal
COM function
• Integrated 4.92MHz RC oscillator
• 64-level global brightness scale
• Binary scale mode or Gray scale mode
• Global blinking or fade function
• Universal COM and Universal Segment function
• Automatic scroll function: up/down/left/right
• Continuous lighting function for ROW24~ROW27
• External current reference control using external
resistor
• Supports row port max. 45mA sink constant current
• 8-level current reference adjustment
• Over temperature protection circuit
I2C-bus or SPI 3-wire interface
• Cascade function for extend applications
• Package Type: 48-pin LQFP-EP
Applications
• Industrial control displays
• Mobile phones
• Traffic signboards and information displays
• Digital clocks, thermometers, counters, electronic
meters
• Instrumentation readouts
• Other consumer applications
• LED displays
General Description
The HT16D35A/HT16D35B are high accuracy
constant current and memory mapping LED display
controller/drivers. The maximum display capacity
of the devices is 224 patterns composed of 28 rows
and 8 commons. The devices can generate a 64 step
Gray Scale (PWM data) using software controlled
PWM circuitry and 64 LED illumination levels using
software controlled PWM circuitry. The devices
provide constant current outputs control using external
resistors for each row output terminal. A serial
interface is provided to allow the devices to receive
instructions for its command mode and data mode.
Only three lines are required for device interfacing to
a host controller. The display capacity can be easily
extended by cascading the devices thus expanding its
application possibilities. The devices are compatible
with most microcontrollers offering easy interfacing
via their two serial interfaces, an I2C interface or a
SPI 3-wire serial interface.
Selection Table
Part Number
HT16D35A
HT16D35B
Interface
3-wire SPI
I2C
Rev. 1.00
1 July 12, 2017



Holtek Semiconductor HT16D35A
Block Diagram
VDD
VSS
CSB/A0
CLK/SCL
DIO/SDA
Filter
I/F
SYNC
OSC
R_EXT
HT16D35A/HT16D35B
6
Control
Circuit
6
Oscillator
I-Reg
Display RAM
4
Brightness
Control
Slope
Control
6
4
Timing
Generator
SW 4
4
PWM
Control
24
Constant Current
LED driver/direct
driver
Constant Current
LED driver
LED scan
output driver
2
LED_VSS
ROW27
ROW24
ROW23
ROW0
COM7
COM0
2 LED_VDD
Pin Assignment
ROW3
ROW2
ROW1
ROW0
R_EXT
VSS
VDD
OSC
DIO
CLK
CSB
SYNC
48 47 46 45 44 43 42 41 40 39 38 37
1 36
2 35
3 34
4 33
5 32
6
HT16D35A
31
7
48 LQFP-EP-A
30
8 29
9 28
10 27
11 26
12 25
13 14 15 16 17 18 19 20 21 22 23 24
ROW15
ROW16
ROW17
ROW18
ROW19
ROW20
ROW21
ROW22
LED_VSS
ROW23
ROW24
ROW25
ROW3
ROW2
ROW1
ROW0
R_EXT
VSS
VDD
OSC
SDA
SCL
A0
SYNC
48 47 46 45 44 43 42 41 40 39 38 37
1 36
2 35
3 34
4 33
5 32
6
HT16D35B
31
7
48 LQFP-EP-A
30
8 29
9 28
10 27
11 26
12 25
13 14 15 16 17 18 19 20 21 22 23 24
ROW15
ROW16
ROW17
ROW18
ROW19
ROW20
ROW21
ROW22
LED_VSS
ROW23
ROW24
ROW25
Rev. 1.00
2 July 12, 2017



Holtek Semiconductor HT16D35A
HT16D35A/HT16D35B
Pin Description
Pin Name
Type
VDD
VSS
LED_VDD
LED_VSS
A0/CSB
I
SCL/CLK
I
SDA/DIO
I/O
OSC
I/O
SYNC
I/O
R_EXT
COM0~COM7
ROW0~ROW27
I
O
O
Function
Positive power supply for logic circuits
Negative power supply for logic circuits – ground
Positive power supply for driver circuits
Negative power supply for driver circuits – ground
I2C interface device address data input pin for I2C interface
Chip Select pin for SPI 3-wire Interface
Serial clock input pin
Serial Clock (SCL) Input for I2C interface
Serial Clock (CLK) Input for SPI 3-wire Interface
Serial data input/output pin. Data is input to or comes out from the shift register at the
clock rising edge.
I2C interface serial data (SDA) Input/Output – NMOS open-drain output.
SPI 3-wire serial interface serial data input/output – CMOS output.
System OSC Input / output pin.
If the IRC Mode command is programmed, the system clock is sourced from the internal
RC oscillator and the system clock is output on the OSC pin.
If the Slave Mode or ERC Mode command is programmed, the system clock is sourced
from an external clock on the OSC pin.
If the MASTER MODE command is programmed, the synchronous signal is output on
the SYNC pin.
If the SLAVE MODE command is programmed, the synchronous signal is input on the
SYNC pin.
External resistor connection input.
Connected to an external resistor to setup the output port current level.
LED common output pins.
LED row output pins.
Absolute Maximum Ratings
Supply Voltage.......................... VSS-0.3V to VSS+6.0V
Input Voltage.............................VSS-0.3V to VDD+0.3V
Operating Temperature..........................-40°C to 85°C
Storage Temperature............................-50°C to 125°C
Thermal Resistance (Rth)................................40°C/W
Max junction Temperature (Tj)..........................125°C
Power Dissipation (PD):
(@Ta=25°C)........................................................ 2.5W
(@Ta=85°C)........................................................ 1.0W
ROW Output Current (Single pin).................... 100mA
Total Power Line Current (Ta=25°C)............. 1000mA
Note: These are stress ratings only. Stresses exceeding the range specified under “Absolute Maximum Ratings”
may cause substantial damage to the device. Functional operation of this device at other conditions beyond
those listed in the specification is not implied and prolonged exposure to extreme conditions may affect
device reliability.
Rev. 1.00
3 July 12, 2017







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