MAX16821A Datasheet, PDF (3/25 Pages) Maxim Integrated Products – High-Power Synchronous HBLED Drivers with Rapid Current Pulsing

High-Power Synchronous HBLED
Drivers with Rapid Current Pulsing
ELECTRICAL CHARACTERISTICS (continued)
(V_CC = 5V, V_DD = V_CC, T_A = T_J = -40°C to +125°C, unless otherwise noted. Typical values are at T_A = +25°C.) (Note 1)
PARAMETER
OSCILLATOR
Switching Frequency Range
Switching Frequency
Switching Frequency Accuracy
CLKOUT Phase Shift with
Respect to DH (Rising Edges)
SYMBOL
CONDITIONS
R_T = 500kΩ
f_SW
R_T = 120kΩ
R_T = 39.9kΩ
120kΩ < R_T ≤ 500kΩ
40kΩ ≤ R_T ≤ 120kΩ
f_SW = 125kHz, MODE connected to SGND
CLKOUT Phase Shift with
Respect to DL (Rising Edges)
f_SW = 125kHz, MODE connected to V_CC
CLKOUT Output-Voltage Low
CLKOUT Output-Voltage High
SYNC Input High Pulse Width
SYNC Input Clock High Threshold
SYNC Input Clock Low Threshold
SYNC Pullup Current
SYNC Power-Off Level
INDUCTOR CURRENT LIMIT
V_OL
V_OH
t_SYNC
V_SYNCH
V_SYNCL
I_{SYNC_OUT}
V_{SYNC_OFF}
I_SINK = 2mA
I_SOURCE = 2mA
V_RT/SYNC = 0V
Average Current-Limit Threshold
Reverse Current-Limit Threshold
Cycle-by-Cycle Current Limit
Cycle-by-Cycle Overload
CURRENT-SENSE AMPLIFIER
V_CL
V_CLR
CSP to CSN
CSP to CSN
CSP to CSN
V_CSP to V_CSN = 75mV
CSP to CSN Input Resistance
R_CS
Common-Mode Range
V_CMR(CS) V_IN = 7V to 28V
Input Offset Voltage
V_OS(CS)
Amplifier Voltage Gain
A_V(CS)
3dB Bandwidth
f_3dB
CURRENT-ERROR AMPLIFIER (TRANSCONDUCTANCE AMPLIFIER)
Transconductance
Open-Loop Gain
g_m
A_VL(CE)
MIN
125
120
495
1515
-5
-8
4.5
200
2
26.4
0
TYP
125
521
1620
180
180
250
27.5
-2.0
60
260
4
0.1
34.5
4
550
50
MAX UNITS
1500 kHz
130
547
kHz
1725
+5
%
+8
Degrees
0.4
V
V
ns
V
0.4
V
500
µA
0.4
V
30.0
mV
mV
mV
ns
kΩ
5.5
V
mV
V/V
MHz
µS
dB
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