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參數(shù)資料
| 型號(hào)： | L8202 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | MULTIFUNCTION ANALOG ASIC |
| 中文描述： | 多功能模擬集成電路 |
| 文件頁(yè)數(shù)： | 7/15頁(yè) |
| 文件大?。?/td> | 237K |
| 代理商： | L8202 |
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7/15
L8202
4
L8202 contains 2 DC/DC converters.
VCC converter is programmable by the Vcc_Select pin for an Output Voltage rated at 3.3V or 5V (1.2A
max.). VDD voltage is programmable by a resistor divider network to voltages from +3V to +17V.
The switching frequency of the two converters is 200KHz.
The Vcc and the VDD regulators are protected by thermal protection circuit with thermal hysteresys (Out-
put Voltages are switched off during thermal protection event). The output voltages, Vcc and VDD are
short circuit protected.
DC/DC CONVERTERS SPECIFICATION
4.1 VCC Regulator
Table 7. Electrical Characteristcs
(T
j
= 25 °C, V
S
= 32 V, unless otherwise specified)
4.2 VDD Regulator
Table 8. Electrical Characteristcs
(T
j
= 25 °C, V
S
= 32 V, unless otherwise specified
)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
CC_o
Vcc Regulator Output Voltage.
Vcc value selected by Vcc_select
pin.
Vcc = 3.3V From 10mA to 1.2A
Vcc = 5V From 10mA to 1.2A
3.23
4.90
3.3
5
3.37
5.20
V
V
I
OC_detect
Over current Threshold level
1.6
4.8
A
I
OC_BK
time
Blankig time for overcurrent
detect
400
ns
I
Vcc_load
Vcc external load current
10
1200
mA
f
ck
Operating frequency
T
amb
= 10 to 55°C
175
200
225
KHz
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
DD_O
VDD Regulator Output Voltage
range
24V
≤
Vs
≤
38V
3
17
V
Vref
Internal reference voltage for error
amp
-2%
1.24
+2%
V
I
VDD_load
Vcc external load current
0.01
3.0
A
I
OC_det_SU
Over current detect level
During start up
2.0
3.2
A
I
OC_det_SC
Over current detect level
During short circuit
4.0
5.5
A
V
Sen_VDD
Current sense voltage
Using external Power DMOS,
this is a voltage of Ext. resistor
between Vs and VDD_source
-20%
250
+20%
mV
I
OC_BK time
Blankig time for overcurrent detect
300
ns
V
GS_C
Gate to source clamp voltage
Vs-15
Vs-10
V
T
Full_LOAD
Transient time after which max load
can be applied to VDD regulator
Vs high, ASIC receives
command to turn on VDD Reg
75
ms
I
ST_UP
Maximum load current appliable
during start up.
1.2
A
f
ck
Operating Frequency
T
amb
= 10 to 55°C
175
200
225
KHz
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