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PDF ( 数据手册 , 数据表 ) UA1538

零件编号 UA1538
描述 4-CH MOTOR DRIVER
制造商 Unisonic Technologies
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UA1538 数据手册, 描述, 功能
UNISONIC TECHNOLOGIES CO.,
UA1538
LINEAR INTEGRATED CIRCUIT
4-CH MOTOR DRIVER FOR
PORTABLE CD PLAYERS
DESCRIPTION
The UTC UA1538 contains a 4ch H bridge driver and
DC-DC converter control circuit on one chip, and was
developed for use in portable CD players.
FEATURES
*Built-in 4ch H bridge driver, and PWM control of load
drive voltage is made possible by external
components.
*DC-DC converter control circuit on chip.
*With reset output inversion output pin.
*Empty detection level can be switched between
rechargeable battery and dry battery.
*Constant current charging; current value can be varied
using external resistor.
*Built-in power transistor for charging.
*Built-in independent thermal shutdown circuit.
www.DataSheet4U.com
QFP-44-0.8
*Pb-free plating product number: UA1538L
ORDERING INFORMATION
Ordering Number
Normal
Lead Free Plating
UA1538-QM1-T UA1538L-QM1-T
Package
QFP-44-0.8
Packing
Tube
www.unisonic.com.tw
Copyright © 2005 Unisonic Technologies Co.,
1
QW-R109-023,B







UA1538 pdf, 数据表
UA1538
LINEAR INTEGRATED CIRCUIT
PARAMETER
SYMBOL
TEST CONDITIONS
Dead Time
DEAD Pin Impedance
RDEAD
DEAD Pin Output Voltage
VDEAD
Starter Circuit
Starter Switching Voltage
VSYS1=VSYS2=0 3.2V,
VSTNM START=0V
Starter Switching Hysteresis Width VSNHS START=0V
Discharge Release
VDIS
Empty Detection
EMP Detection Voltage 1
VEMPT1 VSEL=0V
EMP Detection Voltage 2
VEMPT2 ISEL=- 2µA
EMP Detection Hysteresis Voltage 1 VEMHS1 VSEL=0V
EMP Detection Hysteresis Voltage 2 VEMHS2 ISEL=- 2µA
EMP Pin Output Voltage
VEMP Io=1mA, BSEN=1V
EMP Pin Output Leak Current
IEMPL BSEN=2.4V
BSEN Pin Input Resistance
RBSEN VSEL=0V
BSEN Pin Leak Current
VSYS1=VSYS2=0V
IBSENL BSEN=4.5V
SEL Pin Detection Voltage
VSELTH=BATT-SEL
VSELTH BSEN=2.0V
SEL Pin Detection Current
ISELT
Reset Circuit
VSYS1 RESET Threshold Voltage
Comparison with error amplifier
Ratio
HSRT threshold voltage
RESET Detection Hysteresis Width VRSTHS
RESET Pin Output Voltage
VRST Io=1mA, VSYS1=VSYS2=2.8V
RESET Pin PULL UP Resistance
RRST
AMUTE Pin Output Voltage 1
Io=-1mA, VSYS1=VSYS2=2.8V
VAMT1
AMUTE Pin Output Voltage 2
AMUTE Pin PULL DOWN
Resistance
Op Amp
Input Bias Current
Input Offset Voltage
High Level Output Voltage
Low level Output Voltage
Output Drive Current (Source)
Output Drive Current (Sink)
Open Loop Voltage Gain
Slew Rate
Battery Charging Circuit
RCHG Pin Bias Voltage
RCHG Pin Output Resistance
SEL Pin Leak Current 1
SEL Pin Leak Current 2
SEL Pin Saturation Voltage
Io=-1mA, START=0V,
VAMT2 VSYS1=VSYS2=0V
RAMT
IBIAS
VOIOP
VOHOP
VOLOP
ISOU
ISIN
GVO
SR
OP+=1.6V
RL=OPEN
RL=OPEN
50 GND
50 VSYS1
VIN=-75dBV, f=1kHz
VRCHG
RRCHG
ISELLK1
ISELLK2
VSELCG
CHGVcc=4.5V, RCHG=1.8k .
CHGVcc=4.5V, RCHG=0.5 and
0.6V
CHGVcc=4.5V, RCHG=OPEN,
BATT=4.5V
CHGVcc=0.6V, RCHG=1.8k ,
BATT=4.5V
CHGVcc=4.5V, Io=300mA,
RCHG=0
MIN
52
0.78
2.3
130
1.63
2.1
1.7
25
25
17
1.5
-2
85
25
72
BATT
-0.4
BATT
-0.4
77
-5.5
2.8
0.4
0.71
0.75
TYP
65
0.88
2.5
200
1.83
2.2
1.8
50
50
23
90
50
90
95
0
-6.5
0.7
70
0.5
0.81
0.95
0.45
MAX UNIT
78 k
0.98 V
2.7 V
300 mV
2.03 V
2.3 V
1.9 V
100 mV
100 mV
0.5 V
1.0 A
27 k
1.0 V
V
A
95
100
0.5
108
BATT
%
mV
V
k
V
BATT V
113 k
300 nA
5.5 mV
V
0.2 V
-3.0 mA
mA
dB
V/ s
0.91 V
1.20 k
1.0 A
1.0 A
1.00 V
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
8
QW-R109-023,B







UA1538 equivalent, schematic
UA1538
R1
R2
VSYS1
12
7
EI
LINEAR INTEGRATED CIRCUIT
R3
R1=external resistor
-
+
R4
R2=external resistor
R3=35k
R4=21k
1.2V
(2) Short protect function
·When the error amplifier output(6PIN)has switched to the high-level state, SPRT (8PIN)is charged, and when
the voltage reaches 1.2V typ. , the SW(5PIN)switching stops. The time until switching stops is set by the
capacitor connected to SPRT(8PIN)according to the following formula.
t=CSPRT
VTH
ISPRT
(sec) (VTH=1.2V,ISPRT=10
A)
(3) Soft start function
·The soft start function operates when a capacitor is connected between DEAD(4PIN)and GND.
Also, the maximum duty can be varied by connecting a resistor to 4PIN.
t=CDEAD R(sec) ( R=65k )
(4) Power off function
·When low-level is applied to OFF(40PIN), SPRT(8PIN)is charged, and when the voltage reaches 1.2V typ. ,
the SW(5PIN)switching stops. The time until switching stops is set by the capacitor connected to
SPRT (8PIN)according to the following formula.
t=CSPRT
VTH
IOFF
(sec) (VTH=1.2V,IOFF=20
A)
(5) Over voltage protection circuit
·When the voltage applied to BSEN(1PIN)reaches 8.4V typ. , SPRT (8PIN) is charged, and when the voltage
reaches 1.2V typ. , theSW (5PIN)switching stops. The time until switching stops is set by the capacitor
connected to SPRT(8PIN)according to the following formula.
t=CSPRT
VTH
IHV
(sec) (VTH=1.2V,IHV=20
A)
4 Empty detector block
(1) Output voltage
·When the voltage applied to the BSEN(1PIN)falls below the detector voltage, EMP(35PIN)goes from high
level to low level(open-collector output). The detector voltage has 50mV typ. of hysteresis to prevent
output chattering. Use SEL (42PIN) to switch the detection voltage as shown below.
SEL Detect Voltage Return Voltage
L
2.20V typ.
2.25V typ.
High-Z
1.80V typ.
1.85V typ.
5 Reset circuit block
·At about 90% typ. of the DC-DC converter output voltage, RESET(3PIN)goes from low level to high level,
and AMUTE(34PIN)goes from high level to low level. The reset voltage has 50mV typ. of hysteresis to
prevent output chattering.
6 Charging circuit block
·The power supply for the charging circuit block is CHGVCC(41PIN), and is independent from the other
circuits. The resistance between RCHG (33PIN) and GND sets the charging current. This current is drawn
from SEL (42PIN).
·A thermal shutdown circuit is provided, and when the chip temperature reaches 150 typ. the charging
current is cut. The chip starts operating again at about 120 typ. .
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
16
QW-R109-023,B










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