CP494 Datasheet, PDF (3/11 Pages) Ceramate Technical – SWITCHMODE Pulse Width Modulation Control Circuit

CP494
SWITCHMODE Pulse Width Modulation Control Circuit
ELECTRICAL CHARACTERISTICS (V_CC = 15 V, C_T = 0.01 mF, R_T = 12 kW, unless otherwise noted.)
For typical values T_A = 25°C, for min/max values T_A is the operating ambient temperature range that applies, unless otherwise noted.
Characteristics
Symbol
Min
Typ
Max
Unit
ERROR AMPLIFIER SECTION
Input Offset Voltage (V_{O (Pin 3)} = 2.5 V)
Input Offset Current (V_{O (Pin 3)} = 2.5 V)
Input Bias Current (V_{O (Pin 3)} = 2.5 V)
Input Common Mode Voltage Range (V_CC = 40 V, T_A = 25°C)
Open Loop Voltage Gain (DV_O = 3.0 V, V_O = 0.5 V to 3.5 V, R_L = 2.0 kW)
Unity–Gain Crossover Frequency (V_O = 0.5 V to 3.5 V, R_L = 2.0 kW)
Phase Margin at Unity–Gain (V_O = 0.5 V to 3.5 V, R_L = 2.0 kW)
Common Mode Rejection Ratio (V_CC = 40 V)
Power Supply Rejection Ratio (DV_CC = 33 V, V_O = 2.5 V, R_L = 2.0 kW)
Output Sink Current (V_{O (Pin 3)} = 0.7 V)
Output Source Current (V_{O (Pin 3)} = 3.5 V)
PWM COMPARATOR SECTION (Test Circuit Figure 11)
Input Threshold Voltage (Zero Duty Cycle)
Input Sink Current (V_{(Pin 3)} = 0.7 V)
DEADTIME CONTROL SECTION (Test Circuit Figure 11)
Input Bias Current (Pin 4) (V_{Pin 4} = 0 V to 5.25 V)
Maximum Duty Cycle, Each Output, Push–Pull Mode
(V_{Pin 4} = 0 V, C_T = 0.01 mF, R_T = 12 kW)
(V_{Pin 4} = 0 V, C_T = 0.001 mF, R_T = 30 kW)
Input Threshold Voltage (Pin 4)
(Zero Duty Cycle)
(Maximum Duty Cycle)
V_IO
I_IO
I_IB
V_ICR
A_VOL
f_C–
f_m
CMRR
PSRR
I_O–
I_O+
V_TH
I_I–
I_{IB (DT)}
DC_max
V_th
–
2.0
10
mV
–
5.0
250
nA
–
–0.1
–1.0
mA
–0.3 to V_CC–2.0
V
70
95
–
dB
–
350
–
kHz
–
65
–
deg.
65
90
–
dB
–
100
–
dB
0.3
0.7
–
mA
2.0
–4.0
–
mA
–
2.5
4.5
V
0.3
0.7
–
mA
–
–2.0
–10
mA
%
45
48
50
–
45
50
V
–
2.8
3.3
0
–
–
OSCILLATOR SECTION
Frequency (C_T = 0.001 mF, R_T = 30 kW)
Standard Deviation of Frequency* (C_T = 0.001 mF, R_T = 30 kW)
Frequency Change with Voltage (V_CC = 7.0 V to 40 V, T_A = 25°C)
Frequency Change with Temperature (DT_A = T_low to T_high)
(C_T = 0.01 mF, R_T = 12 kW)
f_osc
–
sf_osc
–
Df_osc (DV)
–
Df_osc (DT)
–
40
–
kHz
3.0
–
%
0.1
–
%
–
12
%
UNDERVOLTAGE LOCKOUT SECTION
Turn–On Threshold (V_CC increasing, I_ref = 1.0 mA)
V_th
TOTAL DEVICE
Standby Supply Current (Pin 6 at V_ref, All other inputs and outputs open)
I_CC
(V_CC = 15 V)
(V_CC = 40 V)
Average Supply Current
(C_T = 0.01 mF, R_T = 12 kW, V_{(Pin 4)} = 2.0 V)
(V_CC = 15 V) (See Figure 12)
5.5
6.43
7.0
V
mA
–
5.5
10
–
7.0
15
mA
–
7.0
–
* Standard deviation is a measure of the statistical distribution about the mean as derived from the formula, s
N
S (X_n – X)²
n=1
N–1
* All specs and applications shown above subject to change without prior notice.
1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN
Tel:[phone]
Fax:[phone]
Page 3 of 11
Email: [e-mail]
Http: www.ceramate.com.tw
Rev 1.0 Apr.19,2004