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NJM2625
PWM TYPE 3-PHASE DC BRUSHLESS MOTOR CONTOROL IC
♦GENERAL DESCRIPTION
The NJM2625 is a 3-phase DC brush-less motor control IC with PWM control.
It incorporates hall amplifiers, PWM control circuits, totem-pole pre drivers for external power MOS transistors, current limit and frequency generator circuit.
The NJM2625 easily implements speed control and rotation direction control for DC motor application.
♦PACKAGE OUTLINE NJM2625D
♦FEATURES •Operating Voltage •Pre-Driver Circuit •Current Limit Sense Voltage •Internal Oscillator •Forward or Reverse Direction •FG Signal Output •Internal Soft Start •Internal ON/OFF Circuit •Bipolar Technology •Package Outline
(V+=8V to 18V) (Iout=+50mA/-150mA MAX.) (Current limit=0.5V±10%) (Frequency control for external capacitor)
(Output frequency to hall frequency) (External capacitor to Verr pin. (No-output is Verr pin to GND.)
DIP20, DMP20
NJM2625M
♦PIN CONFIGRATION
1 2 3 4 5 6 7 8 9 10
NJM2625D NJM2625M
20 19 18 17 16 15 14 13 12 11
PIN FUNCTION
1.FG
11.GND
2.Vref
12.ILIMIT
3.H1+
13.WL
4.H1-
14.VL
5.H2+
15.UL
6.H2-
16.WH
7.H3+
17.VH
8.H39.Verr
18.UH 19.V+
10.OSC
20.F/R
Ver 1.0 - 1 -
NJM2625
♦BLOCK DIAGRAM
20.F/R
3.H1+ 4.H15.H2+ 6.H27.H3+ 8.H3-
19.V+
2.Vref
Rotor Position Decode r
V+
Vref UVLO
10.OSC 9.Verr
Saw Oscillator
PWM COMP
Logic
1.FG 11.GND
FG
V+
16.WH 17.VH 18.UH 13.WL 14.VL 15.UL 12.ILIMIT
-2-
NJM2625
♦ABSOLUTE MAXIMUM RATINGS (Ta=25°C)
PARAMETER
Maximum Supply Voltage Power Dissipation
SYMBOL V+
PD
Operating Temperature Range Storage Temperature Range
Topr Tstg
RATINGS
20
(DIP20)
700
(DMP20)
350
-40 ∼ +85
-50 ∼ +150
UNIT V
mW
°C °C
♦ELECTRICAL CHARACTERISTICS (V+=12V, Ct=1000pF, Cref=1µF, Ta=25°C)
Total Device
PARAMETER
SYMBOL TEST CONDITIONS MIN.
Supply Voltage
V+
8.0
Under Voltage Sense Voltage (Under Voltage Lock Out) Hysteresis Voltage (Under Voltage Lock Out)
Supply Current
UVLO ∆UVLO
Icc
Output Enable V+ Increasing
RL=∞ PWM Duty=50%
7.00 0.4
-
TYP. -
7.25 0.5
15.0
MAX. 18.0
7.50
UNIT V
V
0.6 V
22.0 mA
Hall Sensor Section PARAMETER
Hysteresis Voltage Input Common mode Voltage range Input Bias Current
SYMBOL Vhys Vicm
TEST CONDITIONS
RL=470Ω RL=470Ω
IB
MIN. -
1.5
-
TYP. 30 -
-
MAX. -
10.5
UNIT mV V
600 nA
Output Section PARAMETER
Output Voltage 1 Output Voltage 2
SYMBOL Voh Vol
TEST CONDITIONS Isource=50mA Isink=150mA
MIN. 10 -
TYP. 10.3 1.5
MAX. -
2.0
UNIT V V
Over Current Sense Section PARAMETER
Sense Voltage Input Voltage Range Input Bias Current
SYMBOL
Vth Vip IIB
TEST CONDITIONS
MIN.
0.45 -
TYP.
0.50 -
-0.9
MAX.
0.55 3.0 -5.0
UNIT
V V µA
Oscillator Section PARAMETER
Oscillation Frequency Oscillate Fluctuations (Line Regulation) PWM0% Sense Voltage PWM100% Sense Voltage Saw Wave Peak Voltage Saw Wave Bottom Voltage
SYMBOL TEST CONDITIONS
fosc
? fosc/? V V+=8V to 18V
PWM0 PWM1 Vpfosc Vbfosc
PWM DUTY=0% PWM DUTY=100%
MIN. 20
-
5.40 4.75 0.50
TYP. 25
0.01
5.00 0.65
MAX. 30
5.00
0.35 -
5.25.
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