ISL78226 Datasheet, PDF (19/94 Pages) Intersil Corporation – Cycle-by-cycle peak current limiting

ISL78226
Electrical Specifications Refer to the Block Diagram (page 11) and Typical Application Schematics (page 13). Operating conditions
unless otherwise noted: V_VIN = 48V, V_V6 = 6V, V_V12 = 12V, V_BAT12 = 12V, V_PVCC = 5.2V, V_VCC = 5.2V, V_EN = 5.0V, and T_A = -40°C to +125°C. Typicals are
at T_A = +25°C. Boldface limits apply across the operating temperature range, -40°C to +125°C. (Continued)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
MAX
(Note 8) TYP (Note 8) UNIT
COMP_FLY Output Impedance
Z_{O_EA_FLY}
7.5
MΩ
Flyback Error Amplifier Unity Gain
f_{BW_FLY}
C_{CMP_FLY} = 100pF from COMP_FLY pin to GND
3.3
MHz
Bandwidth
Flyback Error Amplifier Slew Rate
COMP_FLY Output Current Capability
Maximum COMP_FLY Output Voltage
Minimum COMP_FLY Output Voltage
Flyback Controller Soft-Start Current
Flyback Controller Soft-Start Pre-Bias
Voltage Accuracy
Flyback Controller Soft-Start Clamp
Voltage
SL_{EA_FLY}
C_CMP_FLY = 100pF from COMP_FLY pin to GND
±3
I_{O_EA_FLY}
±300
V_{CLMP_EA_FLY}
3.7
3.9
4.1
V_{OMIN_EA_FLY}
0.3
I_{SS_FLY}
V_{SS_FLY} = 0V
4.7
5.2
5.7
V_{SS_FLY_PRE-} V_{SS_FLY_PRE} = 0.5V, measured at SS_FLY pin
-5
5
ACC
V_{SS_CLMP_FLY}
3.4
V/µs
µA
V
V
µA
%
V
SLOPE_FLY Pin Bias Voltage
V_{SLOP_FLY}
R_{SLOP_FLY} = 20kΩ from SLOPE_FLY to AGND
480 500 520
mV
Flyback Controller Slope Accuracy
R_{SLOP_FLY} = 20kΩ (0.1%)
-25
25
%
Minimum SLOPE_FLY Pin Voltage to
Disable Flyback Controller
V_{EN_FLY}
Apply voltage at SLOPE_FLY pin
VCC- VCC
V6
mV
0.8
Flyback Controller Primary Side
Overcurrent Limit Threshold
V_{OC_IS_FLY}
Voltage differences between ISN_FLY to ISP_FLY 55
75
90
mV
Low Level GDRV_FLY Output Voltage
High Level GDRV_FLY Output Voltage
V_{OL_GDRVFLY} I_{O_GDRVFLY} = 10mA
V_{OH_GDRVFLY} I_{O_GDRVFLY} = -10mA
0.1
0.5
V
V12- V12-
V
0.5
0.1
Minimum On Time of Flyback Gate Driver t_{ONMIN_GDRV_} GDRV_FLY = open
FLY
100
ns
Maximum On Duty of Flyback Gate Driver t_{OFFMIN_GDRV_} GDRV_FLY = open, percentage of the PWM clock
91.7
%
FLY
cycle time. Control Register 0x26[2:0] = 000
V6 AND V12 PINS
Input Voltage Rage of V6
Input Supply Current at V6 (Shutdown
Mode)
V_V6
I_{Q_SD_V6}
V_V6 = 6V, EN = GND
5.5
6
11
V
0.1
5
uA
Input Supply Current at V6 (Normal Mode)
I_{Q_V6}
MCU_LDO = Open, Flyback switching
frequency = 500kHz, C_{GDRV_FLY} = 5nF,
MCU_LDO load = 0A, f_SW = 500kHz,
PWMx = open
20
40
mA
V6 Undervoltage Fault Threshold (Rising)
V6 Undervoltage Fault Threshold (Falling)
V6 Undervoltage Fault Threshold
Hysteresis
V_{TH_V6UV-R}
V_{TH_V6UV-F}
V_{TH_V6UV-HYS}
4.66 4.90 5.14
V
4.50 4.80 5.04
V
150
mV
V6 Overvoltage Fault Threshold (Rising)
V6 Overvoltage Fault Threshold (Falling)
V6 Overvoltage Fault Threshold Hysteresis
Input Voltage Rage of V12
Input Supply Current at V12 (Shutdown
Mode)
V_{TH_V6OV-R}
V_{TH_V6OV-F}
V_{TH_V6OVHYS}
V_V12
I_{Q_SD_V12}
EN = GND
11.4 12 12.6
V
11.3 11.9 12.5
V
150
mV
9
12
15
V
0.3
5
µA
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November 7, 2016