Mitsubishi M66503AGP 16-bit constant current led driver with shift register and latch Datasheet

MITSUBISHI
MITSUBISHI
〈DIGITAL
〈DIGITAL
ASSP〉
ASSP〉
M66503ASP/AGP
M66503ASP/AGP
16-BIT
CONSTANT
CURRENT
LED
DRIVER
SHIFT
REGISTER
AND
LATCH
16-BIT
CONSTANT
CURRENT
LED
DRIVER
withwith
SHIFT
REGISTER
AND
LATCH
FEATURES
• Anode-common LED driving
• Constant current output: Set to a value within a range between 0 and 30mA with an external resistor only.
Simultaneous lighting available.
• Pins (OEA, OEB) provided for forced ON/OFF of LED drive
current.
• Greater noise margin: Total-input Schmitt circuit is employed to deal with longer wire lengths.
• Input/output CMOS compatible
• Serial data output provided (SQ15)
• 5V single power supply
• Pin configuration for easier wiring on printed board
APPLICATION
LED array drivers for display panel and printer. Other various
LED modules.
1
30
VCC
A
2
29
RC CURRENT SETTING INPUT
SHIFT CLOCK INPUT CKS
3
28
SQ15 SERIAL DATA OUTPUT
LATCH ENABLE LE
INPUT
NC
4
27
OEA OUTPUT ENABLE INPUT A
5
26
OEB OUTPUT ENABLE INPUT B
Q0
6
25
Q15
Q1
7
24
Q14
GND2
8
23
GND5
Q2
9
22
Q13
Q3
10
21
Q12
Q4
11
20
Q11
GND1
SERIAL DATA INPUT
PARALLEL DATA
OUTPUT
PARALLEL DATA
OUTPUT
Q5
12
19
Q10
GND3
13
18
GND4
Q6
14
17
Q9
Q7
15
16
Q8
PARALLEL DATA
OUTPUT
PARALLEL DATA
OUTPUT
PARALLEL DATA
OUTPUT
PARALLEL DATA
OUTPUT
Outline 30P4B
GND1
SERIAL DATA INPUT A
1
36
VCC
2
35
SHIFT CLOCK INPUT CKS
3
34
RC CURRENT SETTING INPUT
SQ15 SERIAL DATA OUTPUT
LATCH ENABLE LE
INPUT NC
4
33
OEA OUTPUT ENABLE INPUT A
5
32
OEB OUTPUT ENABLE INPUT B
NC
6
31
NC
Q0
7
30
Q15
Q1
8
29
Q14
Q2
9
28
Q13
27
Q12
26
GND3
PARALLEL DATA
OUTPUT
M66503AGP
FUNCTION
The M66503A is a constant current LED driver for anodecommon LEDs. To set the LED driving current, an external
resistor is connected between the current setting input pin,
RC, and GND. In this way it is possible to set a highly accurate drive current. Each bit of the shift register is made up of a
flip-flop performing shift function and a latch connected to the
output. When the clock input pin, CKS, goes from “L” to “H”,
data is shifted. Serial data is entered to the shift register via
the serial data input pin, A. Data on A is straight shifted. By
turning the latch enable input pin, LE, to “L”, the contents
stored in the shift register is latched. All outputs are turned off
if the output enable input pins, OEA and OEB, are simultaneously set to “L”. This function is useful for the prevention of
an excessive current flowing at the moment of power on. All
outputs are turned on if the OEA pin is set to “H”. This enables
to check LEDs for failure. In these actions, changing the state
of OEA and/or OEB does not affect the shift function. To expand the number of bits, link the M66503A in serial using the
serial data output pin, SQ15, which is the serial data output
of the shift register.
PIN CONFIGURATION (TOP VIEW)
M66503ASP
DESCRIPTION
The M66503A is a constant current LED driver IC, whose
output current is variable. The IC’s functions include 16-bit
serial input/parallel output shift register with output latch.
The product uses Bi-CMOS process for highly accurate constant current driving, permitting high-efficiency LED driving
without using a resistor that limits LED current.
Settings for the LED drive current are made by an external resister, thereby ensuring a maximum output current of 30 mA,
enough for anode-common LED driving.
Furthermore, the pin configuration of the IC permits easier
wiring on a printed board.
Q3
10
GND2
11
Q4
12
25
Q11
Q5
13
24
Q10
NC
14
23
NC
NC
15
22
NC
NC
16
21
NC
Q6
17
20
Q9
Q7
18
19
Q8
PARALLEL DATA
OUTPUT
PARALLEL DATA
OUTPUT
PARALLEL DATA
OUTPUT
PARALLEL DATA
OUTPUT
PARALLEL DATA
OUTPUT
Outline 36P2R-D
NC: No Connection
1
2
OEA
OEB
∗1
A
1
D CK
1
D CK
1
D CK
1
D LE
1
D LE
Q2
1
Q1
D LE
Q0
1
D CK
1
D LE
Q3
1
D CK
1
D LE
Q4
CURRENT
SERIAL DATA
SETTING OUTPUT ENABLE INPUT
INPUT
INPUT
∗1: constant current driver
∗2: Regulator
RC
∗2
BLOCK DIAGRAM
1
1
D CK
1
D LE
Q6
1
D CK
1
D LE
Q7
1
1
D CK
1
D LE
1
Q10
D CK
1
D LE
1
Q11
D CK
1
D LE
1
Q12
D CK
1
D LE
1
Q13
(Note 2)
GND1 GND2 GND3 GND4 GND5
D CK
1
D LE
Q9
VCC
D CK
1
D LE
Q8
Note 1: Output current is approximated by the following equation.
IO(Qn) =5 · VCC/(2 · RC+100)
2: GND 1 : for internal digital circuits
GND 2-5: for internal analog circuits
D CK
1
D LE
Q5
PARALLEL DATA OUTPUT (Note 1)
CKS
D CK
1
D LE
1
Q15
LE
SQ15
SHIFT CLOCK LATCH ENABLE
INPUT
INPUT
D CK
1
D LE
1
Q14
SERIAL DATA
OUTPUT
MITSUBISHI 〈DIGITAL ASSP〉
M66503ASP/AGP
16-BIT CONSTANT CURRENT LED DRIVER with SHIFT REGISTER AND LATCH
MITSUBISHI 〈DIGITAL ASSP〉
M66503ASP/AGP
16-BIT CONSTANT CURRENT LED DRIVER with SHIFT REGISTER AND LATCH
FUNCTION TABLE (Note 3)
CKS
↑
↑
X
X
X
LE
H
H
L
X
X
Input
A
OEA
H
L
L
L
X
L
L
L
H
H
OEB
H
H
H
L
X
Q0
L
Z
Q0 0
Z
L
Q1
Q0 0
Q0 0
Q1 0
Z
L
Q2
Q1 0
Q1 0
Q2 0
Z
L
Q3
Q2 0
Q2 0
Q3 0
Z
L
Q4
Q30
Q30
Q40
Z
L
Parallel output
Q5 ··································
Q40 ··································
Q40 ··································
Q50 ··································
Z ··································
L ··································
Q12 Q13 Q14 Q15
Q110 Q120 Q130 Q140
Q110 Q120 Q130 Q140
Q120 Q130 Q140 Q150
Z
Z
Z
Z
L
L
L
L
Serial output
SQ15
q140
q140
q15
q15
q15
Note 3: ↑ : Denotes change from “L” to “H”.
Q0 : Denotes state of Q output before change in CKS input.
x : Either “L” or “H”
q0 : Contents of shift register before change in CKS input
q : Contents of shift register
z : Denotes high impedance state
PIN DESCRIPTION
A
Pin
Name
Serial data input pin
Input/Output
Input
CKS
LE
Shift clock input pin
Latch enable input pin
Input
Input
OEA
OEB
Output enable input
pins
Input
SQ15
RC
Qn
VCC
GND1
GND2~5
Serial data output pin
Current setting input pin
LED connection pins.
Power supply pin
GND pin 1
GND pins 2-5
Output
Input
Output
Description
Shift register’s serial data input pin.
Clock input pin. Shifts data at leading edge.
If “H”, contents in shift register appear at output Qn, and if “L”, contents in shift
register are latched.
Output enable input pins.
If OEA =“H”, all outputs, Qn, are turned on.
If OEA =“L” and OEB =“L”, all outputs, Qn, are turned off.
Serial data output pin of shift register
Connect a resistor between the RC pin and GND to set the driving current.
Driver output pins. Connect LED’s cathodes to these pins.
Connect to positive power source (+5V).
GND for internal digital circuits.
GND for internal analog circuits.
3
MITSUBISHI 〈DIGITAL ASSP〉
M66503ASP/AGP
16-BIT CONSTANT CURRENT LED DRIVER with SHIFT REGISTER AND LATCH
OPERATION
1. LED Drive Current Settings
The M66503A has an internal power supply, which provides a constant current to each bit output. The output
value of the constant current is set by means of a load resistor, RC,connected between the RC pin and GND and is
approximated by the equation below.
IO (Qn) =5·VCC/(2·RC +100)
2. Switching Operation
If the output data of the latch is “H”, LED lights up. The
value of the LED drive current is IO(Qn). If the output data
of the latch is “L”, LED goes off, and the LED drive current
becomes nearly zero, irrespective of the value of IO(Qn).
3. How to Use the OEA and OEB Inputs
If OEA = “L” and OEB = “L”, all output currents are turned
off. Accordingly, it is possible to prevent a large current
from flowing through LESs by, for example, fixing both
OEA and OEB to “L” until VCC, after turned on, reaches a
steady state. If OEA =“H”, all output currents turn on. This
function facilitates the checking of LEDs for failure. When
OEA =“L” and OEB =“H”, each output current turns on and
off according to the output data of the latch.
4. VCC and GND Pins
Pins related to the power supply function are VCC and
GNDs 1-5 (GNDs 1-3 for the M66503AGP). The role of
these pins in terms of the internal circuits are as follows.
: commonly used by both digital and
VCC
analog circuits
GND 1
: used by digital circuits
GNDs 2-5 (2-3) : used by analog circuits
In practical wiring, the following should be noted.
(1) Secure as much width as possible for conductors and
avoid lengthy wiring.
(2) Allocate electrolytic capacitors for stable voltage near VCC
and GNDs 2-5 (2-3).
(3) Allocate by-pass capacitor near VCC and GND1.
4
MITSUBISHI 〈DIGITAL ASSP〉
M66503ASP/AGP
16-BIT CONSTANT CURRENT LED DRIVER with SHIFT REGISTER AND LATCH
ABSOLUTE MAXIMUM RATINGS (Ta = –20 ~ 85˚C unless otherwise noted)
Symbol
VCC
VI
VO
IO
Parameter
Supply voltage
Input voltage
Output voltage
Q0~15
Output
current
SQ15
Conditions
Ratings
–0.3 ~ +7.0
–0.3 ~ VCC + 0.3
–0.3 ~ + 15.0
30
±10
1.74
1.70
–65 ~ 150
M66503ASP Measured being mounted Ta=25˚C(Note 4)
M66503AGP Measured being mounted Ta=25˚C(Note 5)
Pd
Power dissipation
Tstg
Storage temperataure
Unit
V
V
V
mA
W
°C
Note 4. When 7a ≥ 25°C,derate by 13.9mW/°C
Note 5. When 7a ≥ 25°C,derate by 13.6mW/°C
RECOMMENDED OPERATIONAL CONDITIONS
Symbol
VCC
VI
VO
IO
Topr
Conditions
Parameter
Supply voltage
Input voltage
Output voltage
Output current
Q0~Q15
Operational ambient temperature
Min.
4.5
0
0
IO(Qn)=30mA, VO(Qn)=0.8V
Limits
Typ.
5
–20
Max.
5.5
VCC
VCC
30
85
Unit
V
V
V
mA
°C
ELECTRICAL CHARACTERISTICS (VCC =5V ± 10% and Ta = –20 ~ 85˚C, unless otherwise noted)
Symbol
Parameter
VOH
VOL
IOZ
IIH
IIL
IO
Positive-going threshold
voltage
Negative-going threshold
voltage
“H” Output voltage
“L” Output voltage
OFF-state output current
“H” Input current
“L” Input current
Output current
∆IO
Output current bit-to-bit error
ICC
Supply current
VT+
VT–
SQ15
SQ15
All outputs OFF
All outputs ON
Test conditions
VO=0.1V, VCC–0.1V
|IO|=20µA
VO=0.1V, VCC–0.1V
|IO|=20µA
VCC=5.0V, IOH=–0.4mA
VCC=5.0V, IOL=1.6mA
VO(Qn)=VCC
VCC=5.5V, VI=VCC
VCC=5.5V, VI=GND
VO(Qn)=0.8V
VCC=5.0V, VO(Qn)=1.0V
Iref=–6mA
Iref=0mA
Iref=–6mA
VCC=5.5V
Iref=–6mA
Min.
Limits
Typ.
Max.
Unit
0.35×VCC
0.7×VCC
V
0.2×VCC
0.55×VCC
V
0.5
10
5
–5
30
V
V
µA
µA
µA
mA
±6.0
%
5
23
30
mA
4.0
±3.5
5
MITSUBISHI 〈DIGITAL ASSP〉
M66503ASP/AGP
16-BIT CONSTANT CURRENT LED DRIVER with SHIFT REGISTER AND LATCH
TIMING CONDITIONS (VCC=5V ± 10%, Ta=–20 ~ 85˚C)
Symbol
Parameter
tw
tsu(A)
tsu(LE)
th(A)
tr, tf
Test conditions
CKS, LE pulse width
Address setup time to CKS
LE setup time to CKS
Address hold time to CKS
CKS rise and fall time
(Note 6)
Min.
30
20
40
10
Limits
Typ.
Max.
2
Unit
ns
ns
ns
ns
µs
SWITCHING CHARACTERISTICS (VCC=5V ± 10%, Ta=–20 ~ 85˚C)
Symbol
Parameter
fmax
tPLZ
tPZL
tPLH
Test conditions
Maximum frequency for repetitions
CKS–Q0~15(off)
“L-H” and “Z-L” outputs
propagation time
CKS–Q0~15(on)
“L-H” and “H-L” outputs
propagation time
tPHL
tPLZ
tPZL
tPLZ
tPZL
tPLZ
tPZL
“L-Z” and “Z-L” outputs
propagation time
“L-Z” and “Z-L” outputs
propagation time
“L-Z” and “Z-L” outputs
propagation time
CKS–SQ15
LE–Q0~15(off)
LE–Q0~15(on)
OEA–Q0~15(off)
OEA–Q0~15(on)
OEB–Q0~15(off)
OEB–Q0~15(on)
NOTE 6: TEST CIRCUIT
Input
VCC
VCC
RL=100Ω
(1)
Q0~15
DUT
SQ15
P.G.
lref
50Ω
RC
RC=
360Ω
(2)
CL=50pF
(2)
CL=50pF
(1) Characteristics of pulse generator (PG)
Rise time
: tr = 6ns
Fall time
: tf = 6ns
Output impedance : ZO =50Ω
(2) Capacitance CL includes the stray capacitance of the lead
wires and the probe input capacitance.
6
CL=50pF
RL=100Ω
(Note 6)
Min.
5
Limits
Typ.
Max.
250
250
250
250
250
250
250
250
250
250
Unit
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
MITSUBISHI 〈DIGITAL ASSP〉
M66503ASP/AGP
16-BIT CONSTANT CURRENT LED DRIVER with SHIFT REGISTER AND LATCH
TIMING CHARTS
tr
tw
50%
10%
th
VCC
90%
50%
tsu
A
90%
50%
CKs
tf
tw
tsu
10%
GND
th
VCC
50%
50%
50%
tPLH
GND
tPHL
VOH
SQ15
50%
50%
VOL
tPZL
tPLZ
VOH (OFF)
50%
Q0~15
50%
VOL (ON)
VCC
CKs
50%
GND
tsu
tw
VCC
50%
LE
50%
GND
tPLZ
VOH (OFF)
Q0~15
50%
VOL (ON)
tPZL
VOH (OFF)
50%
Q0~15
VOL (ON)
OEA
VCC
50%
50%
GND
VCC
50%
OEB
50%
GND
tPLZ
Q0~15
tPZL
tPLZ
tPZL
50%
50%
50%
50%
VOH (OFF)
VOL (ON)
7
MITSUBISHI 〈DIGITAL ASSP〉
M66503ASP/AGP
16-BIT CONSTANT CURRENT LED DRIVER with SHIFT REGISTER AND LATCH
TYPICAL CHARACTERISTICS
OUTPUT CURRENT VS OUTPUT VOLTAGE
CHARACTERISTICS
50
Q0 OUTPUT CURRENT IO (mA)
Q0 OUTPUT CURRENT IO (mA)
OUTPUT CURRENT VS REFERENCE CURRENT
CHARACTERISTICS (Q0 ON)
VCC=5V
Ta=25°C
VO=0.8V
40
30
20
10
0
0
50
40
30
20
10
0
–4
–8
–12
–16
–20
REFERENCE CURRENT lref (mA)
VCC=5V
Ta=25°C
lref=–5.4mA
0
0.4
0.8
1.2
1.6
Q0 OUTPUT VOLTAGE VO (V)
2.0
APPLICATION EXAMPLE
5V
LED16 × 16 Dot Display
5V
LED
Display
scan input
5V
Q0
Q1
RC
Currenf setting
input
A
Serial date
input
8
Q15
M66503ASP/AGP
CKS
LE
Shift clock Latch enable
input
input
OEA
OEB
Output enable input
SQ15
Serial date
Output
Similar pages