M61880FP Datasheet PDF - Mitsubishi
| Part Number | M61880FP | |
| Description | Laser-diode driver / controller | |
| Manufacturers | Mitsubishi | |
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MITSUBISHI < DIGITAL ASSP >
M61880FP
Laser-diode driver / controller
DESCRIPTION
The M61880FP is a semiconductor laser-diode driver/
controller. Its functions are the driving and laser power
control of a specific type(Mitsubishi's N-type laser)of
semiconductor laser diode,in which the anode of a
semiconductor laser diode is connected in stem structure
to the cathode of a monitoring photodiode.
The IC has a laser drive current output pin of sink type
and is capable of driving a laser diode on a maximum bias
current of 40mA and a maximum switching current of 100
mA,which is switching at a rate of 200Mbps.
Since the M61880FP has a built in sample-hold circuit,it is
possible to realize an internal APC* system that requires
no external device for laser power control.
*:Automatic Power Control
FEATURES
Built-in sample-hold circuit for internal APC function
Hold error voltage is less than 1% for 1µs(C=0.047µF)
High speed switching 200Mbps
Large driving current 100mA (max)
Capable of setting bias current (40mA max)
5V single power supply
APPLICATION
Semiconductor laser-diode applied equipment
Laser beam printer(LBP)
Plain Paper Copier(PPC)
PIN CONFIGURATION (TOP VIEW)
OUTPUT TO SWITCHING
CURRENT SETTING LOAD
RS
1
GND1 2
OUTPUT TO BIAS CURRENT RB
SETTING LOAD
BIAS CURRENT SETTING
VOLTAGE INPUT
VB
REFERENCE VOLTAGE
OUTPUT
Vref
REFERENCE VOLTAGE
INPUT
Vr
3
4
5
6
HOLDING CAPACITOR
LOAD INPUT/OUTPUT
CH
7
SAMPLE-HOLD
CONTROL INPUT
S/H 8
Vcc1 9
NC 10
20 Vcc2
19
RO
LASER CURRENT
LOAD OUTPUT
18 N C
17
LD
LASER CURRENT
OUTPUT
16 GND2
15
PD
MONITORING
DIODE INPUT
14
DATA SWITCHING
DATA INPUT
13 ENB LASER CURRENT
ENABLE INPUT
12 2RM MONITORING
LOAD INPUT 2
11 1RM MONITORING
LOAD INPUT 1
NC : No connection
Outline 20P2N-A
BLOCK DIAGRAM
Vcc2 RO N C LD GND2 PD DATA ENB 2RM 1RM
20 19 18 17 16 15 14
13
12 11
+
TTL/ECL
ISW
COMP
IB
1 23
RS GND1 RB
2.5V
50K
Reference
voltage
1.5V
4 56
VB Vref Vr
7
8 9 10
S/H Vcc1 NC
( 1 / 11)
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MITSUBISHI < DIGITAL ASSP >
M61880FP
Laser-diode driver / controller
ABSOLUTE MAXIMUM RATINGS (Ta = -20 ~ 70°C unless otherwise noted)
Symbol
Parameter
Conditions
Vcc Supply voltage
CH, Vr
VI Input voltage
DATA, ENB, S/H
VO Output voltage RO
Isw Switching current
IB Bias current
Pd Power dissipation
Measured being mounted
Ta = 25°C(Note)
Tstg Storage temperature
Note: For operation above 25°C, derating of 9.8mW/°C is necessary.
Ratings
-0.3 ~ +5.5
-0.3 ~ +Vcc
-0.3 ~ +Vcc
-0.3 ~ +Vcc
120
50
980
-60 ~ +150
Unit
V
V
V
mA
mA
mW
°C
RECOMMENDED OPERATIONAL CONDITIONS (Ta = -20 ~ 70°C unless otherwise noted)
Symbol
Parameter
Limits
Unit
Min. Typ. Max.
Vcc Supply voltage
4.75 5.0 5.25 V
Isw
IB
Topr
Switching current
Bias current
Operating ambient temperature
-20
100 mA
40 mA
70 °C
Note: Isw + IB ≤ 100mA
ELECTRICAL CHARACTERISTICS (Ta = -20 ~ 70°C, Vcc = 5V±5% unless otherwise noted)
Symbol
Parameter
Test conditions
VIH "H" Input voltage
VIL "L" Input voltage
Vr Reference voltage input
Reference
Vref voltage
output
DATA,ENB,S/H
DATA,ENB,S/H
Vr
Vref Io = ±10µA
Temperature
coefficient
Ta = -20 ~ 25°C
Ta = 25 ~ 70°C
Limits
Min. Typ.
2.0
0.35
1.4
1.5
0.1
-0.1
VLD Operating voltage range LD
2.5
VI Maximum effective voltage CH
VOH "H" output voltage
CH
VOL "L" output voltage
CH
ENB= "L" ,IoL= (-0.6mA)
ENB= "L" ,IoH= (0.6mA)
2.7 3.0
Vcc-1.6
II Input current
DATA,ENB
VI = 2.7V
VI = 0.4V
-0.2
Isw Switching current
LD
CH=3.5V,Rs=1.2kΩ,VLD=3V
75
IB Bias current (Note)
Icg Load charging current
Idg Load discharge current
LD
CH
CH
VB=1.5V,RB=70Ω,VLD=3V
ENB= "L" ,Vo=( 0.6 ~ Vcc-1.6V)
ENB= "L" ,Vo=( 0.6 ~ Vcc-1.6V)
20
-1.0
0.66 1.0
Ioz Output current under off CH
condition
Vo=2.0 ~ 3.0V, Hold condition
-0.5
LOFF Output current under off
condition
LD
ENB= "L" ,DATA= "H" ,Isw=50mA
ENB= "H" ,DATA= "L" ,Isw=50mA
Max.
0.8
2.0
1.6
Unit
V
V
V
V
mV/°C
Vcc
0.6
20
-0.66
V
V
V
V
µA
mA
mA
mA
mA
mA
+0.5 µA
50 µA
50 µA
Icc Supply current
Vcc=5.25V,ENB=0V, DATA=0V
CH=3.5V,VB=1.4V
Isw=75mA,IB=25mA
RO=LD=5.0v
DATA=4.5V
43 63
mA
43 63
*Typical values are gained under conditions of Ta=25°C and Vcc=5V.
Note: This parameter indicates the conversion characteristics of the input voltage and output current.In actual use, Isw and IB
shall be within the range specified as limits in the recommended operating conditions.
( 5 / 11 )
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