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參數(shù)資料
| 型號(hào)： | LB8118M |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP44 |
| 封裝： | QIP-44 |
| 文件頁(yè)數(shù)： | 2/9頁(yè) |
| 文件大小： | 113K |
| 代理商： | LB8118M |
LB8118M
No.5838-2/11
Continued from preceding page.
PWM step-down circuit for external power operates when external power (4 V or higher) is supplied.
In this function, external power is converted to VCC power supply, and two type voltage setting is possible.
In playback mode, step-up voltage for DSP has to be set equal to or lower than VCC, but in charging the battery, it has
to be set higher enough than VCC.
So step-down voltage (VCC) setting of two types is possible with two pairs of external resistor. (Switching port is
provided.)
(However, the PWM PNP-Tr, NPN-Tr, L, C, and Di are all external.)
APC step-up power supply for the laser diode. (Also supports a pre-power supply for the internal bias.) The laser diode
is controlled with a voltage of roughly 0.5 V.
Battery pulse charging function on chip. (However, the drive NPN-Tr, and the current feedback C and R are external.)
Battery check comparator on chip.
The system can be started up and stopped by outputs from the microcontroller.
Actuator muting function on chip (for all four channels simultaneously).
Thermal shutdown circuit on chip.
Specifications
Absolute Maximum Ratings at Ta = 25 C
Parameter
Symbol
Conditions
Ratings
Unit
Maximum supply voltage
VCCmax
7V
VCD pin input voltage
VCDmax
10
V
H bridge output current
IOUTmax
Maximum per channel is 400 mA.
800
mA
Allowable power dissipation
Pd max
Independent IC
700
mW
Operating temperature
Topr
–20 to +75
°C
Storage temperature
Tstg
–55 to +150
°C
Allowable Operating Ranges at Ta = 25 °C
Parameter
Symbol
Conditions
Ratings
Unit
Supply voltage
VCC
1.6 to 5.0
V
VCD pin input voltage
VCD
3.6 to 9.0
V
VCC drop setting voltage when
3 to 5
V
external voltage input is applied
VCC(EXT)
H Bridge limiter voltage
VH LIM
0.15 to 2.25
V
Electrical Characteristics at Ta = 25 °C, VCC = 3 V, VCD = 4 V
Parameter
Symbol
Conditions
min
typ
max
Unit
[Power Supply Block]
Standby current drain
ICCO
S/S = H, the total of VCC and VCD
100
μA
VCC quiescent current drain
ICC
S/S = L, VCC line only
11
15
mA
VCD quiescent current drain
ICD
S/S = L, with no driver input
3.5
5.0
mA
[ASP step-up circuit]
ASP drive output current
IO ASPDRV
2.1
2.5
2.9
mA
VASP pin input bias current
IB VASP
200
nA
ASPBASE pin saturation
voltage
VO ASPBASE
IO = 1 mA
0.1
0.2
V
Load regulation
RLD ASP
VASP = 3.4 V, L = 30 μH, C = 220 μF
1000 mV/A
Line regulation
RLN ASP
VASP = 3.4 V, L = 30 μH, C = 220 μF
100 mV/V
Minimum off duty
DMIN ASP
50
%
[APC step-up circuit]
APC drive output current
IO APCDRV
0.37
0.50
0.63
mA
VAPC pin input bias current
IB VAPC
200
nA
VAPC – VLD voltage
VAPC – LD
0.35
0.50
0.65
V
Load regulation
RLD APC
VAPC = 3.4 V, L = 30 μH, C = 220 μF
1000 mV/A
Line regulation
RLN APC
VAPC = 3.4 V, L = 30 μH, C = 220 μF
100 mV/V
Minimum off duty
DMIN APC
50
%
Continued on next page.
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