MAX8834Y(2009) 데이터 시트보기 (PDF) - Maxim Integrated
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MAX8834Y Datasheet PDF : 43 Pages
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Adaptive Step-Up Converters
with 1.5A Flash Driver
ELECTRICAL CHARACTERISTICS (continued)
(VIN = 3.6V, VAGND = VPGND = VFGND = 0V, VDD = 1.8V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at
TA = +25°C.) (Note 1)
PARAMETER
CONDITIONS
Maximum Duty Cycle
Minimum Duty Cycle
COMP Transconductance
COMP Discharge Resistance
VOUT = 4.5V
VOUT = 4.5V
VCOMP = 1.5V
During shutdown or UVLO, from COMP to AGND
OUT Discharge Resistance
During shutdown or UVLO, from OUT to LX
FLED1/FLED2 CURRENT REGULATOR
IN Supply Current
Step-up off, FLED1/FLED2 on, supply current for each
current source
Maximum Current Setting
Flash
Movie
23.44mA setting
TA = +25°C
Current Accuracy
492.24mA setting
TA = +25°C
TA = -40°C to +85°C
750mA setting
TA = -40°C to +85°C
Current Regulator Dropout
(Note 2)
492.24mA setting
93.75mA setting
FLED1/FLED2 Leakage in
Shutdown
VFLED1 = VFLED2 = 5.5V
INDLED CURRENT REGULATOR
TA = +25°C
TA = +85°C
IN Supply Current
Step-up converter off, INDLED on
Maximum Current Setting
Current Accuracy
Current Regulator Dropout
0.5mA setting
16mA setting
16mA setting (Note 2)
TA = +25°C
TA = +25°C
TA = -40°C to +85°C
INDLED Leakage in Shutdown
PROTECTION CIRCUITS
NTC BIAS Current
VINDLED = 5.5V
TA = +25°C
TA = +85°C
MIN TYP MAX UNITS
69
75
%
7.5
%
55
μS
120
10
k
0.6
mA
750
mA
125
-5
+20
%
-2.5 ±0.5 +2.5
%
-4
+4
-10
+5
%
110
mV
50
100
-1
0.01
+1
μA
0.1
0.6
mA
16
mA
-10
+10
%
-3
±0.5
+3
%
-5
+5
%
55
130
mV
-1
0.01
+1
μA
0.1
19.4
20
20.6
μA
NTC Overtemperature Detection
Threshold
VNTC falling, 100mV hysteresis, NTC_CNTL[2:0] = 100
388
400
412
mV
NTC Short Detection Threshold
Flash Duration Timer Range
VNTC falling
In 50ms steps (Note 3)
100
mV
50
800
ms
Flash Duration Timer Accuracy
(400ms Setting)
Minimum Flash Duration
TA = +25°C
TA = -40°C to +85°C
FLASH_EN[2:0] = 1XX
360 400 440
ms
320
480
2
ms
Flash Safety Timer Reset Inhibit From falling edge of LED_EN until flash safety timer is
Period
reset
30
ms
Watchdog Timer Range
In 4s steps
4
16
s
4 _______________________________________________________________________________________
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